Dissertations / Theses on the topic 'Forced choice'
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Langley, Moses Michael. "d' is not appropriate for contrasting yes-no and forced-choice recognition." [Ames, Iowa : Iowa State University], 2006.
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Hall, Ashley K. "Examination of Something Else as a Response Alternative in Forced-Choice Questions." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1415117471.
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Convertino, Christina. "Forced to Choose: School Choice and the Spatial Production of Youth Identities in a Post-Industrial Age." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/145122.
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In this educational ethnography, I focused on how parents and students enrolled in a public charter high school in Sundale City (pseudonym), Arizona made the choice to attend a charter school. I also focused on educational reforms in the context of two large district high schools to further contextualize family choice-making. In contrast to the prevailing view that it is primarily parents with the requisite cultural and social capital who access school choice, participants in this study were `forced' to choose an alternative to their neighborhood district school due to the harmful effects of being marginalized and penalized in traditional district school contexts. With implications for policy and practice, this anthropological study expands the polemic surrounding school choice by considering the discursive practices inscribed in traditional school contexts that force out disenfranchised students. Understanding of family choice-making and students' experiences contributes to theorizing social inequality and educational reform in new ways that lead to the development of equitable school spaces.
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Wu, Shu-Chen. "Nursing home care for elderly people in Taiwan : a process of forced choice." Thesis, Leeds Beckett University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423858.
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Naefgen, Christoph [Verfasser], and Markus [Akademischer Betreuer] Janczyk. "The similarities and differences of free and forced choice tasks / Christoph Naefgen ; Betreuer: Markus Janczyk." Tübingen : Universitätsbibliothek Tübingen, 2019. http://d-nb.info/1179181689/34.
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Lin, Charlette. "Out of Sight Out of Mind? The Effects of Prior Study and Visual Attention on Word Identification." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1430322757.
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Nelson, Nicole L. "A Facial Expression of Pax: Revisiting Preschoolers' "Recognition" of Expressions." Thesis, Boston College, 2011. http://hdl.handle.net/2345/2458.
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Thesis advisor: James A. RussellPrior research showing that children recognize emotional expressions has used a choice-from-array style task; for example, children are asked to find the fear face in an array of several expressions. However, these choice-from-array tasks allow for the use of a process of elimination strategy in which children could select an expression they are unfamiliar with when presented a label that does not apply to other expressions in the array. Across six studies (N = 144), 80% of 2- to 4-year-olds selected a novel expression when presented a target label and performed similarly when the label was novel (such as pax) or familiar (such as fear). In addition, 46% of children went on to freely label the expression with the target label in a subsequent task. These data are the first to show that children extend the process of elimination strategy to facial expressions and also call into question the findings of prior choice-from-array studies
Thesis (PhD) — Boston College, 2011
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Psychology
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Humann, Michael. "Deliberation and implementation activity in forced-choice decision making environments : variations in information processing within a neurocognitive framework." Thesis, University of Liverpool, 2011. http://livrepository.liverpool.ac.uk/5653/.
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This thesis examined decision making in the context of forced-choice situations, as characterised by high-risk consequences and time-limited conditions, within an experimental decision paradigm. By mapping onto basic decision-making stages relating to evaluation, deliberation and implementation of a choice, this research looks at how environmental conditions (emotion) and information (advice) affect cognitive processing in forced-choice or “do or don’t” scenarios. In order to identify these variations on a more fundamental level, a methodological framework was developed, which incorporates neurocognitive, behavioural and qualitative measures. Results identified the distinct sequence of cognitive processes as predicted from basic decision-making models. When individuals lacked any meaningful information to assist in solving the tasks, their responses varied based on the consequential conditions they faced, leading to an accelerated engagement with the decision and faster response, the riskier the outcome. On the other hand, when information was available during the task, differences in responses followed predictions about information processing and cognitive effort required for the different levels of clarity. Here, the consequential conditions did not affect performance, as individuals prioritised the information available. Further, when solving a task lacking any meaningful information on which to base their choice, individuals still engaged in redundant deliberation. Taken together, the research suggests that outcome uncertainty and task ambiguity have a demonstrable effect on the decision-making process. This research, incorporating neurocognitive measures, showed a robust framework to advance current understanding about the interplay of affecting factors and basic decision-making processes. Providing an additional reference, this approach contributes to a more in-depth picture of underlying processes.
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Wu, David, and dwu8@optusnet com au. "Perceptually Lossless Coding of Medical Images - From Abstraction to Reality." RMIT University. Electrical & Computer Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080617.160025.
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This work explores a novel vision model based coding approach to encode medical images at a perceptually lossless quality, within the framework of the JPEG 2000 coding engine. Perceptually lossless encoding offers the best of both worlds, delivering images free of visual distortions and at the same time providing significantly greater compression ratio gains over its information lossless counterparts. This is achieved through a visual pruning function, embedded with an advanced model of the human visual system to accurately identify and to efficiently remove visually irrelevant/insignificant information. In addition, it maintains bit-stream compliance with the JPEG 2000 coding framework and subsequently is compliant with the Digital Communications in Medicine standard (DICOM). Equally, the pruning function is applicable to other Discrete Wavelet Transform based image coders, e.g., The Set Partitioning in Hierarchical Trees. Further significant coding gains are ex ploited through an artificial edge segmentation algorithm and a novel arithmetic pruning algorithm. The coding effectiveness and qualitative consistency of the algorithm is evaluated through a double-blind subjective assessment with 31 medical experts, performed using a novel 2-staged forced choice assessment that was devised for medical experts, offering the benefits of greater robustness and accuracy in measuring subjective responses. The assessment showed that no differences of statistical significance were perceivable between the original images and the images encoded by the proposed coder.
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Seybert, Jacob. "A New Item Response Theory Model for Estimating Person Ability and Item Parameters for Multidimensional Rank Order Responses." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4942.
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The assessment of noncognitive constructs poses a number of challenges that set it apart from traditional cognitive ability measurement. Of particular concern is the influence of response biases and response styles that can influence the accuracy of scale scores. One strategy to address these concerns is to use alternative item presentation formats (such as multidimensional forced choice (MFC) pairs, triads, and tetrads) that may provide resistance to such biases. A variety of strategies for constructing and scoring these forced choice measured have been proposed, though they often require large sample sizes, are limited in the way that statements can vary in location, and (in some cases) require a separate precalibration phase prior to the scoring of forced-choice responses. This dissertation introduces new item response theory models for estimating item and person parameters from rank-order responses indicating preferences among two or more alternatives representing, for example, different personality dimensions. Parameters for this new model, called the Hyperbolic Cosine Model for Rank order responses (HCM-RANK), can be estimated using Markov chain Monte Carlo (MCMC) methods that allow for the simultaneous evaluation of item properties and person scores. The efficacy of the MCMC parameter estimation procedures for these new models was examined via three studies. Study 1 was a Monte Carlo simulation examining the efficacy of parameter recovery across levels of sample size, dimensionality, and approaches to item calibration and scoring. It was found that estimation accuracy improves with sample size, and trait scores and location parameters can be estimated reasonably well in small samples. Study 2 was a simulation examining the robustness of trait estimation to error introduced by substituting subject matter expert (SME) estimates of statement location for MCMC item parameter estimates and true item parameters. Only small decreases in accuracy relative to the true parameters were observed, suggesting that using SME ratings of statement location for scoring might be a viable short-term way of expediting MFC test deployment in field settings. Study 3 was included primarily to illustrate the use of the newly developed IRT models and estimation methods with real data. An empirical investigation comparing validities of personality measures using different item formats yielded mixed results and raised questions about multidimensional test construction practices that will be explored in future research. The presentation concludes with a discussion of MFC methods and potential applications in educational and workforce contexts.
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Kristiansen, Willy. "Can earlier relationship experiences act as a stable moderator of the sex difference in forced-choice sexual jealousy responses?" Thesis, Norges teknisk-naturvitenskapelige universitet, Psykologisk institutt, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26393.
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The sex difference in forced-choice sexual jealousy responses has over the past 20 years gradually been established as a stable sex difference by the empirical literature (e.g. Sagarin et al., 2012). The search of possible moderators of the sex-difference has therefore been intensified. In this thesis I aim to investigate to what extent, if any at all, does earlier relationship experiences act as a stable moderator of the sex-difference. For that purpose, I administrated four infidelity scenarios and questions regarding earlier relationship to 473 undergraduate students, 281 women and 192 men. The results from the infidelity scenarios support the established view that men become more upset by sexual aspects of infidelity compared to women. This result is also in line with previous studies conducted in Norway (Kennair et al., 2011; Bendixen et al., submitted). In search of possible moderators connected to earlier relationship experiences I investigated the possible moderation of whether the participants were in a relationship or not, whether the participants have experienced infidelity or not, and whether the participants were in their earlier twenties or late twenties. The results indicate that none of these three factors acted as moderators. For the participants who had experience with infidelity, I investigated the possible moderation of whether the infidelity happened in a previous or current relationship, how long ago since the infidelity occurred, and the degree of commitment in the relationship where the infidelity occurred. None of these three factors resulted in any positive findings. Overall, the results of this thesis indicate that the sex-difference is quite robust in terms of different relationship experiences. In the discussion I emphasize that future research should replicate my negative findings with larger sample sizes and with samples containing other respondents than just undergraduate students. This thesis show that the quest to find stable moderators of the established sex difference in jealousy may be harder than previously thought.
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Lee, Philseok. "Investigating Parameter Recovery and Item Information for Triplet Multidimensional Forced Choice Measure: An Application of the GGUM-RANK Model." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6298.
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To control various response biases and rater errors in noncognitive assessment, multidimensional forced choice (MFC) measures have been proposed as an alternative to single-statement Likert-type scales. Historically, MFC measures have been criticized because conventional scoring methods can lead to ipsativity problems that render scores unsuitable for inter-individual comparisons. However, with the recent advent of classical test theory and item response theory scoring methods that yield normative information, MFC measures are surging in popularity and becoming important components of personnel and educational assessment systems. This dissertation presents developments concerning a GGUM-based MFC model henceforth referred to as the GGUM-RANK. Markov Chain Monte Carlo (MCMC) algorithms were developed to estimate GGUM-RANK statement and person parameters directly from MFC rank responses, and the efficacy of the new estimation algorithm was examined through computer simulations and an empirical construct validity investigation. Recently derived GGUM-RANK item information functions and information indices were also used to evaluate overall item and test quality for the empirical study and to give insights into differences in scoring accuracy between two-alternative (pairwise preference) and three-alternative (triplet) MFC measures for future work. This presentation concludes with a discussion of the research findings and potential applications in workforce and educational setting.
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Harrison, Charles. "Assessing malingered responding : concurrent validation of a forced-choice test using ink blot stimuli for the identification of malingered responses /." Full text available from ProQuest UM Digital Dissertations, 2008. http://0-proquest.umi.com.umiss.lib.olemiss.edu/pqdweb?index=0&did=1850434951&SrchMode=1&sid=16&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1278707663&clientId=22256.
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Haberlin, Alayna T. "An Examination of Behavioral History Effects on Preference for Choice in Elementary Students." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1282061359.
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Fisher, Kimberly Gail. "The relative utility of implicit memory tasks and a forced-choice memory test for the detection of simulated brain injury deficits." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0002/NQ34261.pdf.
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Gorbunova, Anastasia A. "Measuring Unconscious Processes in Visual Word Recognition Using Two-Alternative Forced Choice Tasks in Conjunction with Confidence Ratings and Psychophysiological Recordings." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195906.
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The present dissertation aims to evaluate the phenomenon of visual masking as a tool for studying visual awareness focusing on two-alternative forced choice (2AFC) discrimination tasks. Two existing theories of masking - Bachmann's (1984) perceptual retouch theory and Marcel's (1983) recovery theory - are discussed along with the global neuronal workspace theory of awareness (Baars. 1989; Dehaene, Kerszberg, & Changeux, 1998). Performance accuracy on Semantic discrimination is compared to that on Orthographic discrimination as an indication of a potential difference between semantic and orthographic processing of masked word stimuli presented for 40 ms and 50 ms. This is further compared to an e-detection task previously used as an indicator of awareness in some masked priming experiments. Together, these tasks are further evaluated in terms of their relationship with participants' subjective reports collected in the form of confidence ratings. The implications and predictions drawn from the theories of masking and visual awareness as well as the notion of partial awareness (Kouider & Dupoux, 2001) are assessed taking into account the data obtained in the current experiments.The relevance of these data for masked priming is determined by performing a comparison between 2AFC discrimination and detection tasks, and the lexical decision task. An ERP study is also presented, in which Semantic and Orthographic discrimination as well as e-detection are paired with confidence ratings and electrophysiological recordings in search of an ERP component that can be correlated with both subjective (confidence) and objective (performance) measures of awareness. A binding account of visual awareness with special attention paid to visual masking is proposed and compared to the three existing theories.
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Rotte, Kristin N. "Destination ‘e’: Detecting and Managing Customer Uncertainty in a Forced Migration Initiative Within a Business-to-Business Market." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1029346772.
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Brown, Anna. "How Item Response Theory can solve problems of ipsative data." Doctoral thesis, Universitat de Barcelona, 2010. http://hdl.handle.net/10803/80006.
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Multidimensional forced-choice questionnaires can reduce the impact of numerous response biases typically associated with Likert scales. However, if scored with traditional methodology these instruments produce ipsative data, which has psychometric problems, such as constrained total test score and negative average scale inter-correlation. Ipsative scores distort scale relationships and reliability estimates, and make interpretation of scores problematic. This research demonstrates how Item Response Theory (IRT) modeling may be applied to overcome these problems. A multidimensional IRT model for forced-choice questionnaires is introduced, which is suitable for use with any forced-choice instrument composed of items fitting the dominance response model, with any number of measured traits, and any block sizes (i.e. pairs, triplets, quads etc.). The proposed model is based on Thurstone's framework for comparative data. Thurstonian IRT models are normal ogive models with structured factor loadings, structured uniquenesses, and structured local dependencies. These models can be straightforwardly estimated using structural equation modeling (SEM) software Mplus. Simulation studies show how the latent traits are recovered from the comparative binary data under different conditions. The Thurstonian IRT model is also tested with real participants in both research and occupational assessment settings. It is concluded that when the recommended design guidelines are met, scores estimated from forced-choice questionnaires with the proposed methodology reproduce the latent traits well.
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Murray, Sarah Louise. "Development of the New Zealand Stimuli for the University of Canterbury Adaptive Speech Test-Filtered Words (UCAST-FW)." Thesis, University of Canterbury. Communication Disorders, 2012. http://hdl.handle.net/10092/7131.
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Auditory processing disorder (APD) is a label that describes a variable set of symptoms that share a common feature of difficulty listening to sounds in the absence of an actual audiological deficit (Moore, 2006). Clinical assessment of APD typically involves a test battery consisting of tests designed to examine the integrity of various auditory processes of the central auditory nervous system. Individuals with APD have difficulty recognising speech when parts of the signal are missing. One category of tests used to assess the extent to which this deficit is associated with reduced performance on the task is the low-pass filtered speech test. The University of Canterbury Adaptive Speech Test-Filtered Words (UCAST-FW) is a computer-based adaptive low-pass filtered speech test developed for the assessment of auditory processing skills in adults and children. Earlier studies with the UCAST-FW (McGaffin, 2007; Sincock, 2008; Heidtke, 2010; Abu-Hijleh, 2011) have produced encouraging results. However, there appear to be a number of confounding factors. The UCAST-FW is testing New Zealand listeners using an Australian recording of American test material. The purpose of the current study was to develop a new four-alternative forced choice test to replace the Northwestern University Children’s Perception of Speech (NU-CHIPS) stimuli the UCAST-FW currently utilises. The new test consists of 98 sets of four test items, (one target item and three foil alternatives) designed to be used in a four-alternative forced choice picture-pointing procedure. Phonemic analysis of the new word list and the NU-CHIPS word lists revealed a similar distribution of phonemes for target words of both word lists. The development of the new word list is described and the clinical applicability is explored.
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Stephan, Sarah Allison. "THE PREDICTIVE VALIDITY OF STIMLULUS PREFERENCE ASSESSMENTS." Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1216247455.
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Hagihara, Hiromichi. "The Differentiation of Early Word Meanings from Global to Specific Categories: Towards a Verification of the“Semantic Pluripotency Hypothesis”." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263725.
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京都大学新制・課程博士
博士(人間・環境学)
甲第23264号
人博第979号
京都大学大学院人間・環境学研究科相関環境学専攻
(主査)教授 阪上 雅昭, 教授 谷口 一美, 准教授 森口 佑介
学位規則第4条第1項該当
Doctor of Human and Environmental Studies
Kyoto University
DGAM
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Harris, Lisa. "An examination of social desirability confounds in a new ipsative measure of Murray's Psychogenic Needs." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1720.
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A reliable and valid instrument for the direct measurement of the relative strength of psychological needs is currently lacking. In response to this shortcoming, a new ipsative instrument, the Psychogenic Need Scale (PNS), is currently being developed; this is a 190-item forced-choice self-report measure that is based upon Murray’s psychogenic needs. For the development of a valid forced-choice instrument, it is critical to minimise the confounding effects of social desirability (the tendency for respondents to describe oneself in the most favourable light). Whilst other measures typically use specifically designed scales to detect social desirability confounds, this approach is unsuitable for forced-choice measures that require respondents to choose between paired statements. Instead, a preferable approach is to reduce or, ideally, eliminate social desirability confounds by ensuring that the two alternative statements in each item pair are equally desirable. However, because the PNS is in the preliminary stages of development, the statements’ relative social desirability levels had not yet been systematically investigated. Thus, it was not known whether or not the statements were equally desirable. Accordingly, I attempted this stage of the test's construction. Two main objectives were addressed. The first was to examine the test statements in order to determine whether or not they shared sufficiently equal levels of social desirability. The second was to equalise any differences (should they be detected) by rewording problematic statements to either reduce or increase their social desirability as needed. Upon initial investigation (Phase One of Study One), it was confirmed that there were differences among the statements. Thus, several attempts were made to equalise the relative social desirability levels. After a series of four studies, whereby statements with markedly high or low levels were repeatedly reworded and reexamined, some of the differences were effectively reduced. However, despite these reductions, the overall results demonstrate that problematic differences still exist. It was concluded that some statements in the PNS are likely to be inherently confounded with high or low social desirability and, thus, cannot be sufficiently adjusted without disrupting the validity of the constructs that they are supposed to measure. On that basis, it is likely that a valid forced-choice measure of Murray’s psychogenic needs is not achievable.
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Massendari, Delphine. "La programmation des saccades oculaires chez l'homme : rôle et décours temporel des traitements visuels élémentaires." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM3023/document.
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Notre environnement visuel est riche en lumière, couleurs, traits, textures et formes. Pour appréhender cette richesse, nous déplaçons nos yeux tous les quarts de seconde à l'aide de mouvements très rapides appelés saccades. Une telle vision dite active a fait l’objet de multiples recherches, mais les interactions entre les systèmes visuel et oculomoteur ne sont pas clairement établies. Cette thèse vise à préciser ces interactions en étudiant si les délais temporels associés au traitement d'informations visuelles de plus en plus élaborées contraignent où et quand nos yeux bougent. Trois séries d'études comportementales menées chez l'homme et utilisant des paradigmes novateurs ont été réalisées. Elles nous ont permis de mettre en évidence que le traitement des contrastes d'orientation, tout comme le traitement des contrastes de luminance sont intégrés par le système saccadique. En effet, un stimulus (distracteur) différant d'un fond texturé par sa luminance ou son orientation dévie le regard de sa cible dans la même mesure, et ce, quelle que soit la latence des saccades. Néanmoins, le contraste de luminance conserve un rôle prédominant. Premièrement, il conduit au déclenchement plus précoce des saccades en comparaison avec le contraste d’orientation. Deuxièmement, dès lors qu'il entre en compétition avec des informations plus élaborées comme le contour, il suffit à déterminer la métrique des saccades. Ainsi, en accord avec l'architecture des systèmes visuel et oculomoteur, les traitements visuels influencent la programmation des saccades de manière ordonnéeOur environment is rich in light, color, features, textures, and shapes. To extract this information, we move our eyes four times per second with rapid eye movements called saccades. This so-called active vision has been studied extensively, but the interactions between the visual and oculomotor systems have not been fully characterized yet. This thesis aims to clarify these interactions by investigating whether the delays in processing visual information of increasing complexity determine where and when our eyes move. The present work focuses on three types of basic visual processing for which the neural substrates are well established and predict a specific order in the programming of saccades at the level of the superior colliculus. We conducted three series of behavioral studies with human participants using novel experimental paradigms. These studies showed that orientation-contrast processing as well as early luminance-contrast processing are integrated in the saccadic system to the same extent. When aiming for a target stimulus, the eyes deviate toward a distractor stimulus in equal measure, irrespective of whether the distractor differed in luminance or orientation from a texture background and irrespective of saccade latency. However, the role of luminance contrast remains dominant. Firstly, luminance contrast triggers faster saccades than orientation contrast. Secondly, when luminance contrast competes with more complex information such as contour, solely luminance contrast determines saccade metrics. Therefore, visual processes influence saccade programming in a specific order that is consistent with the architecture of the visual and oculomotor systems
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Trippas, Dries. "Motivated reasoning and response bias : a signal detection approach." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/2853.
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The aim of this dissertation was to address a theoretical debate on belief bias. Belief bias is the tendency for people to be influenced by their prior beliefs when engaged in deductive reasoning. Deduction is the act of drawing necessary conclusions from premises which are meant to be assumed as true. Given that the logical validity of an argument is independent of its content, being influenced by your prior beliefs in such content is considered a bias. Traditional theories posit there are two belief bias components. Motivated reasoning is the tendency to reason better for arguments with unbelievable conclusions relative to arguments with believable conclusions. Response bias is the tendency to accept believable arguments and to reject unbelievable arguments. Dube et al. (2010) pointed out critical methodological problems that undermine evidence for traditional theories. Using signal detection theory (SDT), they found evidence for response bias only. We adopted the SDT method to compare the viability of the traditional and the response bias accounts. In Chapter 1 the relevant literature is reviewed. In Chapter 2 four experiments which employed a novel SDT-based forced choice reasoning method are presented, showing evidence compatible with motivated reasoning. In Chapter 3 four experiments which used the receiver operating characteristic (ROC) method are presented. Crucially, cognitive ability turned out to be linked to motivated reasoning. In Chapter 4 three experiments are presented in which we investigated the impact of cognitive ability and analytic cognitive style on belief bias, concluding that cognitive style mediated the effects of cognitive ability on motivated reasoning. In Chapter 5 we discuss our findings in light of a novel individual differences account of belief bias. We conclude that using the appropriate measurement method and taking individual differences into account are two key elements to furthering our understanding of belief bias, human reasoning, and cognitive psychology in general.
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Pereira, Anne Gleide Filgueira. "Caracterização da percepção visual em crianças e adolescentes com epilepsia: aspectos cognitivos e sociais." Universidade Federal da Paraíba, 2009. http://tede.biblioteca.ufpb.br:8080/handle/tede/6998.
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Epilepsy is a brain dysfunction characterized by the repeated tendency of the brain to cause epileptic crisis and by the neurobiological, cognitive, psychological and social consequences of this condition. In these terms, the aim of this work is to determine the visual sensory threshold of children and adolescents who have and who do not have epilepsy, analyzing possible alterations in the form related to this dysfunction. The sensory threshold is defined as the smallest intensity of incentive a human being is capable of detecting. The contrast sensitivity function (CSF) is the inverse of the threshold curve of contrast (1/CSF). This way, the CSF is a tool that allows us to label the answer of SV to visual patterns in low, medium and high levels of contrast and evaluate possible sensorial alterations associated with the visual processing. The main idea is that the elevation or reduction of the CSF can happen deem to sensorial, cognitive and behavioral alterations. Twenty volunteers participated on this study, from both genders, between 7 and 17 years of age, 10 of whom nonepileptic and 10 epileptic (tonic-clonic crisis). All of them presented either normal or corrected visual accuracy and were distributed in groups that were equivalent in age. The resolutions were taken from the psychophysical forced-choice method, using the static sine wave gratings with spatial frequencies of 0.25, 2.0 and 8.0 cpd (cycles per degree of visual angle). During each experimental session, there were stimulus pares presented randomly (test stimulus and neutral), and the task of the participants was to choose always the test stimulus with one of the frequencies above. The criterion used was the one of three consecutive correct answers to low the contrast in one unity and just one mistake to increase the contrast in the same unity (20%). After each session, a sheet of results with the experimental situation was released and the six values of contrast were calculated by the reversions. The values of contrast obtained to each frequency were grouped in spreadsheets separated by condition (with or without epilepsy) and the big average was used as an estimative of the sensory threshold or of the sensibility to the contrast due to each spatial frequency tested. The analysis of variance (ANOVA) to repeated measures showed significant differences between the groups [F(1,238) = 11.80); p<0.01]. The analysis obtained with the help of the test posthoc Tukey HSD revealed a relevant dissimilarity only in the 0.25cpg (p<0.01)]. In other words, the results indicated an expressive alteration in the visual perception children and adolescents with epilepsy have.
A epilepsia é um distúrbio cerebral caracterizado pela predisposição persistente do cérebro para gerar crises epilépticas e pelas conseqüências neurobiológicas, cognitivas, psicológicas e sociais desta condição. Algumas pesquisas demonstram que distúrbios visuais são bastante freqüentes em pessoas com epilepsia. Nestes termos, o objetivo deste trabalho foi determinar o limiar sensório visual de crianças e adolescentes com e sem epilepsia, verificando possíveis alterações na percepção visual da forma relacionadas a este transtorno. O limiar sensório é definido como a menor intensidade de um estímulo que um ser humano é capaz de detectar. A função de sensibilidade ao contraste (FSC) é o inverso da curva de limiar de contraste (1/FSC). Assim, a FSC é uma ferramenta que permite caracterizar a resposta do SV para padrões visuais em níveis baixos, médios e altos de contraste e avaliar possíveis alterações sensoriais relacionadas ao processamento visual. A idéia principal é que a elevação ou redução da FSC pode está relacionada a alterações sensoriais, cognitivas e comportamentais. Participaram deste estudo, 20 voluntários de ambos os sexos com idades entre 7 e 17 anos, sendo 10 sem epilepsia e 10 com epilepsia (crises tônicoclônicas). Todos apresentavam acuidade visual normal ou corrigida e foram distribuídos pelos grupos atendendo ao critério de equivalência de idade. As medidas foram realizadas com o método psicofísico da escolha forçada, utilizando grade senoidal vertical estática com freqüências espaciais de 0,25; 2,0 e 8,0 cpg (ciclos por grau de ângulo visual). Durante cada sessão experimental, foram apresentados aleatoriamente pares de estímulos (estímulo de teste e neutro), e a tarefa dos participantes foi escolher sempre o estímulo de teste com uma das freqüências acima. O critério adotado foi o de três acertos consecutivos para diminuir o contraste em uma unidade, e apenas um erro para aumentar o contraste na mesma unidade (20%). Após cada sessão, o programa produzia uma folha de resultados com a situação experimental e os seis valores de contraste conseguidos pelas reversões. Os valores de contraste obtidos para cada freqüência foram agrupados em planilhas por condição (com e sem epilepsia) e a grande média foi utilizada como estimativa do limiar sensório ou da sensibilidade ao contraste em função de cada freqüência espacial testada. A análise de variância (ANOVA) para medidas repetidas mostrou diferenças significantes entre os dois grupos [F(1, 238) =11,80); p < 0,01]. Já a análise com o teste post-hoc Tukey HSD revelou diferença significante apenas na faixa de freqüências de 0,25 cpg (p < 0,01). Em termos gerais, os resultados demonstraram alteração significante na percepção visual da forma de crianças e adolescentes com epilepsia.
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Ferreira, Daniel Petrus. "Push - and pull forces within outbound destination choice." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/11091.
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Push- and pull forces are considered the most important motivational factors in driving tourism demand. Push forces are motivational forces that arise due to the individual’s need to travel, while pull forces are destination attributes which pull the traveller to the specific destination and in doing so they satisfy the need of the traveller. Understanding why people travel, how they go about selecting their holiday destination and why one country is preferred to the other, is vital to the continued success of the tourism industry. The needs and wants of travellers are constantly changing, therefore, it is imperative that tourism businesses excel at developing new products and services which are better suited to the needs of consumers. The primary objective of this study was to determine the push- and pull forces that influence outbound destination choice in Nelson Mandela Bay Metropole. The study investigated and analysed how the independent variables (push- and pull factors) influence destination choice (dependent variable). From a comprehensive literature review, a hypothetical model was developed to test the relationships between push-and pull forces and destination choice. Twelve hypotheses were formulated to test the relationship between four push forces, eight pull forces and destination choice. The study sought the perceptions of Nelson Mandela Bay Metropole residents and utitised the quantitative research paradigm. A survey was conducted with the aid of a structured self-administered questionnaire, distributed via e-mail and as a hard copy. A combination of convenience- and snowball sampling was utilised. The final sample comprised 302 respondents. The validity of the measuring instrument was ascertained by using exploratory factor analysis. The Cronbach’s alpha values for reliability were calculated for each of the factors identified during the exploratory factor analysis. The top ten destinations visited and intended to be visited were indicated. United Kingdom was the most visited international destination for both leisure and business purposes, while The United States of America was the most popular international destination to visit next for both leisure and business purposes. Pearson product-moment correlation and multiple regression analysis were used to test the correlation and significance of the relationships hypothesised between the various independent and dependent variables. Three statistically significant relationships were found between the push forces (physical and stature motivators and destination accessibility) and destination choice. Four statistically significant relationships were found between the pull forces (events, natural attractions, political issues and general infrastructure) and destination choice. The empirical findings further confirmed that an inter-relationship between push- and pull forces within destination choice does exist. However, pull forces influence push forces to a larger extent. Analysis of variance calculations were used to identify if significant relationships exist between the twelve demographic variables and nine reliable and valid independent variables. Furthermore, post-hoc Scheffè tests identified where the significant differences occurred between the different categories. Cohen’s d-values were calculated in order to assess the practical significance of the mean scores. A total of sixteen practical significant relationships were identified. Travel companies should compile travel packages and tours that serve the needs of both leisure- and business travellers. They can use social media as a communication- and promotion tool to entice travellers to specific destinations. The business travel packages should be all inclusive and include transportation, accommodation and even entries to events. The visual aids, utilised within the marketing material, should entice travellers to want to visit these destinations, and outline the favourable general infrastructure available. When marketing outbound destinations, travel service providers must pay attention to demographical variables such as gender, age, ethnical affiliation, income and marital status to compile travel packages that satisfy the needs of specific groups.
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Petillo, April Dama Jackson. "By Force or Choice: Exploring Contemporary Targeted Trafficking of Native Peoples." Thesis, The University of Arizona, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3704248.
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Targeted U.S. domestic sex trafficking of Native peoples has been documented since the time of Custer (Deer 2010, Smith 2005, Smith 2003). According to a few, geographically specific studies this practice continues today (Juran, et al 2014, Minnesota Indian Women's Sexual Assault Coalition 2011, Pierce and Minnesota Indian Women’s Resource Center 2009). The Trafficking Victims Protection Act of 2000 (TVPA), it’s subsequent reauthorizations and the Violence Against Women’s Act (VAWA) 2013 reauthorization have encouraged activists in Indian Country, defined broadly, to believe that a change is possible within the system if they continue to raise the issue. But what if that strategy is flawed? Despite increasing awareness, it is clear that the United States policy environment has not yet experienced any significant change since the introduction of anti-trafficking law in 2000—especially for Native America. Using a tribal, feminist, critical race perspective alongside Native Nation (re)Building theory and a grounded, interdisciplinary focus, this study explores prominent public policy perceptions about how widespread the targeted domestic sex trafficking of Native peoples is in the United States. The first of its kind, this study reaches across broad geography and perspectives to locate synergies and ruptures that may also present opportunities for Native self-determination in creating effective Indian Country solutions. It also offers United States public policy suggestions helpful in addressing anti-trafficking legislative inefficiencies beyond Indian Country generally.
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Domazos, Efthymios. "The choice social representation and the formation of the Hellenic Armed Forces /." Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://edocs.nps.edu/npspubs/scholarly/MBAPR/2008/Dec/08Dec%5FDomazos%5FMBA.pdf.
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"Submitted in partial fulfillment of the requirements for the degree of Master of Business Administration from the Naval Postgraduate School, December 2008."Advisor(s): Eitelberg, Mark ; Hudgens, Bryan. "December 2008." "MBA professional report"--Cover. Description based on title screen as viewed on January 28, 2009. Includes bibliographical references (p. 251-255). Also available in print.
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Woolshlager, Richard S., and Fredrick J. Wright. "Force of choice: optimizing theater special operations commands to achieve synchronized effects." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/27922.
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SOCAFRICA, a theater special operations command (TSOC), executes the full spectrum of Special Operations in complex environments, emphasizing the indirect approach to operations. The operational emphasis on preventive activities in a steady-state environment provides access, awareness, and options to the U.S. and its partners in the event of crises. Special Operation Forces (SOF) have doubled in size over the past decade, and SOCOM has built tremendous capabilities in that time, but TSOCsthe regional-level SOF organizationshave not shared in these capability increases. Because TSOCs are under-manned and under-resourced, they are not capable of effectively applying the indirect approach to achieve long-term effects for Geographic Combatant Commanders and Chiefs of Mission. Change is needed to improve TSOC effectiveness. This thesis will analyze the organizational shortfalls of TSOCs through the lens of the newest TSOC, SOCAFRICA, and will examine USSOCOMs Global SOF Network concept which intends to provide authorities, capabilities, and resources to TSOCs to make them the force of choice at the regional level. SOCOM has established a road map to optimize TSOCs. However, the GSN alone is not capable of implementing the necessary changes; it will require commitment and continued support from the individual services, the GCCs, and from Congress. t
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Young, Alexandra Robin. "Families of Choice: A qualitative study of Australian families formed through intercountry adoption." University of Sydney, 2009. http://hdl.handle.net/2123/6037.
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Doctor of Philosophy (PhD)Recent sociological literature on family life focuses on the apparently increasing scope for individual choice in forming meaningful, intimate relationships. One important arena for the exercise of such choice is adoption, which is increasingly taking place across national boundaries, taking the form of intercountry adoption. Little attention, however, has been paid to this aspect of contemporary family life by these broader accounts of family change. The research which deals specifically with intercountry adoption focuses on the development and trends of the practice as well as outcome studies, often undertaken in the fields of social work and psychology, and there is little research which investigates the interaction between the general trends in family structure and intercountry adoption. This study responds to these gaps in the literature by examining the experiences of individuals choosing to form families through intercountry adoption in the Australian social policy environment. Documentary evidence was used to understand the development of Australian intercountry adoption and provide the historical and social policy context for the qualitative component of the study. Semi-structured in-depth interviews were conducted to develop an understanding of the choice participants made to form their family through intercountry adoption, and to examine how the state manages this area of social policy. My study found that individuals choose to form families through intercountry adoption because children are a crucial means by which they can add meaning to their lives and intimate relationships by providing another human being to love and nurture. This child focus was seen as ‘natural’ and, for some, as an inevitable extension of their relationship. The research also generated findings about the nature of relationships within intercountry adoptive families and the factors which influence how these families are different from biological families. The complex policy environment in Australia creates difficulties for individuals negotiating the system and diversity in legislation and practice among states results in an unclear policy orientation. The movement of children across international boundaries, while not new, has been influenced by a number of global forces including improved transport, enactment of international treaties, media coverage and the introduction of the internet. These advances have resulted in increased knowledge and access to information about intercountry adoption and a more developed understanding of how the process operates in other countries, which impacts on the experience of the process in Australia. The sociological account of family formation involving intercountry adoption in Australia that I have developed in this thesis confirms that relationships of choice are being formed in postmodern society, despite messages from a variety of authorities regarding family life which are often mixed, contradictory and dominated by particular family types, rather than by the concept of choice. My study differs from existing studies on intercountry adoption in its achievement of an account of the personal experiences of the intercountry adoption process and family life that links the two together, to show both how broader issues in postmodern family formation structure intercountry adoption, and how intercountry adoption constitutes a vital element of contemporary family formation.
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Woodford, Bettina J. "With forked tongues : linguistic ideologies and language choices among Castilian speakers in Barcelona /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/8209.
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Darwich, May Ayman Hassan. "Ideational and material forces in threat perception : Saudi and Syrian choices in Middle East wars." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/19478.
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How do states perceive threats? Why are material forces sometimes more prominent in shaping threat perception, whereas ideational ones are key in other instances? This study aims to move beyond the task of determining whether material or ideational factors offer a more plausible explanation by arguing that threat perception is a function of the interplay between material factors and state identity, the influence of which can run both ways. Based on ‘analytical eclecticism’, I develop a two-layered conception of security as both physical and ontological, in which the interaction of ideational and material forces can be analysed. Ontological security is intimately connected with identity; its pursuit, therefore, requires distinctiveness and differentiation from the ‘Other’ as well as a coherent and consistent identity narrative at the domestic level. Physical security, on the other hand, involves the identification of threats that constitute a danger to the survival of the state. While ontological and physical security spheres have distinct dynamics and processes, they constitute two interrelated layers. Accordingly, I argue that states can suffer from ontological insecurity while their physical security remains intact, and vice versa. In some instances, physical security and its corresponding material forces condition identity narratives while in other instances the causal arrow points in the other direction. To illustrate these processes, I present a ‘structured, focused’ comparison of Syrian and Saudi threat perceptions during three major wars in the region: the Iran-Iraq War (1980-1988), the 2006 Lebanon War, and the 2009 Gaza War. While providing novel insights for explaining the dynamics of threat perception in the Middle East, this study contributes to the broader IR literature by proposing a conceptual framework that links the literature on Self/Other relations, ontological security, and realism in IR theory. This study thus demonstrates the potential utility of bringing IR theory and the Middle East as an area study into closer dialogue.
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JONES, NIKITA M. "COMMUNITY RESISTANCE TO THE SECTION 8 HOUSING CHOICE VOUCHER PROGRAM: A CASE STUDY OF THE MULTI-NEIGHBORHOOD HOUSING TASK FORCE IN CINCINNATI, OHIO." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116257807.
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Söderqvist, Björn. "School Leaders' View on Market Forces and Decentralisation : Case Studies in a Swedish municipality and an English County." Doctoral thesis, Stockholm University, Department of Education, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7102.
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The overall aim of this study is to describe and analyse some of the consequences of market forces and decentralisation in the educational systems of Sweden and England.
Since the 1980s, many countries have restructured their educational systems and introduced decentralisation and market forces. The reasons have sometimes been the same and sometimes they have differed, but demands for better school performance and the need for economic cuttings in the public sector, including schooling, are two of the most common reasons. This study will describe the development towards market forces and decentralisation in some countries in the western world in general, and, in particular Sweden and England.
The thesis makes a general overview of research on these issues in different countries and focuses on certain key concepts. Interviews and document analyses are the principal methods used, and case studies have been conducted in seven secondary schools in one Swedish municipality, and in ten schools in an English county. Interviews were made with 20 school leaders in the Swedish municipality and 20 in the English community in order to study their opinions on market solutions like competition and choice of school, as well as decentralisation and local management of schools.
The findings indicate that the educational systems of Sweden and England differ in many aspects, even if both can be described as decentralised. While the Swedish system gives the schools a high degree of autonomy, whereby the school leaders are responsible for almost everything in the daily running of the school, the English system includes more aspects of centralism, and provides less local decision making. The findings also indicate that the school leaders in Swedish municipalities are more satisfied with both decentralisation and market forces in schooling than their English colleagues. Several plausible interpretations could be made of the interview answers from the school leaders, but it seems that the higher degree of decentralisation in the Swedish educational system is perhaps the most important factor in this case.
Finally, the findings also indicate that the school leaders see positive aspects of choice and competition in schooling, like increased quality and better efficiency, as well as negative aspects, primarily the risk of segregation due to free school choice.
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Jones, Nikita M. "Community Resistance to the Section 8 Housing Choice Voucher Program a Case Study of the Multi-Neighborhood Housing Task Force in Cincinnati, Ohio /." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1116257807.
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Lewitz, Ebba. "Was the search for respectability a driving force for Western women to join ISIS? : A qualitative study on the choice behind Western women joining ISIS." Thesis, Linnéuniversitetet, Institutionen för samhällsstudier (SS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-106036.
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The purpose of this thesis is to investigate if women from the Western world joined ISIS in search of respectability. Beverly Skegg’s (1997) theory of respectability was used as the theoretical framework and as a lens to shape the result. The study collected information on women from the Western world known to have joined the Islamic State and then analyzed them to see if it was respectability they were searching for. Skeggs theory will be further explained in the theory chapter. This thesis is looking at articles, interviews, and YouTube clips of women who have joined ISIS this thesis will determine if it was because of respectability or not. The findings were relevant and useful because the interviews and articles went into depth on why Western women joined ISIS. The result and conclusion for this study are that Western women join ISIS in search of respectability.
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Hanzlík, Tomáš. "Analýza dynamického chování štíhlých konstrukcí a návrh zařízení na omezení vibrací." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-392278.
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Thesis deals with the modeling of pedestrian excitation of structures and obtaining the corresponding dynamic response of the structure. The trend of modern slender structures places more emphasis on the accuracy of modeling pedestrian dynamic excitation, which is difficult because of the intelligent behavior of pedestrians and the biological nature of the modeled pedestrian. First part of the thesis deals with traditional models of pedestrian excitation, based on application of pedestrian ground force to the model of construction. Models are explored on a model of slender footbridge for many different excitation variants in order to explore the specifics of the force excitation application and the structure response calculation. In second part of the thesis biomechanical pedestrian models are developed, including inertial forces, to calculate the pedestrian interaction with the structure. Parametric studies carried out on simplified structural models research the influence of design parameters of biomechanical models on dynamic response. The aim is to obtain a more accurate model of the pedestrian-construction system for refinement of the design of structures. The design of a tuned mass dampers for the reduction of pedestrian induced vibrations is also explored. Tuned mass dampers are devoted to parametric studies that deal with the influence of design parameters of the damper on the efficiency and design requirements of the device. The aim is to explore the design parameters and their influence on the efficient and economical design of the device. In the thesis were developed two biomechanical models, a simple biomechanical model with one vertical degree of freedom and a bipedal model of a human walking. Models have proven a certain degree of interaction when exciting light footbridges by one pedestrian. Bipedal model then also brought a partial insight into the mechanics of walking and the causes of pedestrian contact forces.
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Stanley, Bruce Edwin. "Selective privatization of security: why American strategic leaders choose to substitute private security contractors for national military force." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13610.
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Doctor of PhilosophySecurity Studies Program
Jeffrey Pickering
Ideas about why US foreign policy actors have turned ever more frequently to private military contractors (PMCs) and private security contractors (PSCs) over the past decade and a half abound. Descriptive accounts of the rise of these corporations have become something of a cottage industry over the past decade or so. The various ideas advanced have yet to be placed under rigorous empirical scrutiny, however. This dissertation builds from the existing descriptive literature to advance a new theoretical framework to explain the rise of private contractors. It analyzes this framework as well as alternative ideas using both quantitative and qualitative analysis, marking the first time this important subject has been systematically examined with both social science methods.
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Smith, Megan. "A clash of cultures : exploring the perceptions and experiences of South African youth towards the military as an employer of choice." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96851.
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Thesis (MA)--Stellenbosch University, 2015.ENGLISH ABSTRACT: With the shift to an all-volunteer force and the end of the Cold War, armed forces across the globe are finding it increasingly difficult to attract, recruit and retain the right quantity and quality of recruits in the ranks. Similarly, the South African National Defence Force (SANDF) has expressed difficulties with recruitment but more so with the ability to attract ‘high calibre’ recruits in order to staff a defence force that is disciplined and technologically advanced. Although this is a consequence of various economic, social and political factors, one of the greatest challenges facing recruiters is the changing work values and preferences of the new millennial generation. As the title of this thesis postulates, evidence from the West suggests a ‘clash’ in values between millennials, who are individualistic, protected, ambitious and self-centred, and the military, which requires conformity, obedience and structure. While there is a vast amount of literature regarding the all-volunteer force and youth values of military service in the West, there is no study of this kind in South Africa. In this study, I aim to fill this void by exploring young South Africans’ perceptions and experiences of military service. As there is no existing literature on the propensity to enlist in South Africa, focus groups and interviews were conducted with high school learners, Military Skills Development System (MSDS) members who have completed one year of military service and recruitment officers who come into contact with school-leavers from across South Africa. These discussions were framed around two broad questions, namely what are the work values of young South Africans and what factors attract young people to or deter them from the military job. The conclusion is reached that the SANDF is not an employer of choice because of various institutional and societal factors. The military job is largely unappealing to young South Africans, who are risk-averse, individualistic and wish to be in close proximity to their families. The culture of the military is also unattractive to the majority who are not receptive to authoritarian regimes that expect unquestioning obedience and discipline and emphasise hegemonic masculine ideals. Besides this, two societal forces have a significant impact on the ability of the ability of the SANDF to attract recruits. The decline in the prestige of the military job and the presence of an ever-growing civilmilitary gap indicate that youth are neither informed about the military nor see the military as a high status job in society. Consequently, the inability of the SANDF to meet recruitment targets can be detrimental to the ability of the SANDF to fulfil its mandate.
AFRIKAANSE OPSOMMING: Sedert die verskuiwing na weermagte wat geheel en al uit vrywilligers bestaan en die einde van die Koue Oorlog vind gewapende magte wêreldwyd dit steeds moeiliker om voldoende rekrute van die regte kwaliteit te lok, te werf en te behou. Ook die Suid-Afrikaanse Nasionale Weermag (SANW) ervaar probleme met werwing, maar veral met die vermoë om ‘hoëkaliber’-rekrute te lok na ’n weermag wat gedissiplineer en tegnologies gevorderd is. Hoewel dit die gevolg van verskeie ekonomiese, sosiale en politieke faktore is, is een van die grootste uitdagings vir werwingspersoneel die veranderende werkwaardes en werkvoorkeure van die nuwe milenniumgenerasie. Soos die titel dit stel, dui getuienis uit die Weste op ’n ‘waardekonflik’ tussen hierdie generasie, wat individualisties, beskut, ambisieus en selfgesentreerd is, en die militêr, wat konformiteit, gehoorsaamheid en struktuur vereis. Hoewel daar ’n magdom literatuur oor vrywilligersmagte en jeugwaardes van militêre diens in die Weste bestaan, is geen studie van hierdie aard nog in SuidAfrika onderneem nie. Met hierdie studie wil ek hierdie leemte vul deur jong Suid-Afrikaners se persepsies en ervarings van militêre diens te verken. Aangesien daar geen literatuur bestaan oor geneigdheid om by die weermag in Suid-Afrka aan te sluit nie, is fokusgroepe gehou en onderhoude gevoer met hoërskoolleerders, MSDS-lede wat hul eerste diensjaar voltooi het en werwingsoffisiere wat met landwyd met skoolverlaters in aanraking kom. Hierdie gesprekke is afgegrens deur twee breë vrae, naamlik wat die werkwaardes van jong Suid-Afrikaners is en watter faktore jong mense na of van die militêre werk lok of afstoot. Die gevolgtrekking is dat die SANW om verskeie institusionele en maatskaplike redes nie ’n voorkeurwerkgewer is nie. Jong Suid-Afrikaners, wat risikoweersinnig en individualisties is en naby hulle familie wil bly, vind ʼn militêre loopbaan breedweg onaantreklik. Die militêre kultuur spreek ook nie die meerderheid aan nie, wat nie ontvanklik is vir outoritêre regimes wat onverbiddelike gehoorsaamheid en dissipline eis en hegemoniese manlike ideale beklemtoon nie. Hierbenewens is daar twee samelewingsfaktore wat ʼn beduidende impak het op die SANW se vermoë om rekrute te werf. Die kwynende prestige van ʼn militêre loopbaan en die teenwoordigheid van ʼn steeds groeiende kloof tussen siviel en militêr dui daarop dat jongmense nóg oor die militêr ingelig is nóg dit as ’n werk met status in die samelewing beskou. Gevolglik kan die SANW se onvermoë om werwingsteikens te behaal sy vermoë om sy mandaat uit te voer nadelig beïnvloed.
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Wittwer, Rico. "Zwangsmobilität und Verkehrsmittelorientierung junger Erwachsener." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-158952.
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In der Mobilitätsforschung entstand in den vergangenen Jahrzehnten eine breite Wissensbasis für das Verständnis von Verkehrsursachen und Zusammenhängen, die das Verkehrsverhalten determinieren. Mit der Entwicklung von Verkehrsmodellen lag das Forschungsinteresse zunächst primär bei Ökonomen und Ökonometrikern sowie Verkehrsingenieuren. Bald kamen andere Wissenschaftsbereiche wie die Psychologie oder die Geowissenschaften hinzu, welche sich in der Folge zunehmend mit dem Thema Mobilität befassten und die zur Erklärung des menschlichen Verhaltens ganz unterschiedliche Methoden und Maßstäbe nutzten. Heute versuchen zumeist handlungsorientierte Ansätze, auf Individualebene, Faktoren zu bestimmen, die Aufschluss über die Verhaltensvariabilität in der Bevölkerung geben und damit einen möglichst großen Beitrag zur Varianzaufklärung leisten. Werden Einflussfaktoren in geeigneter Weise identifiziert und quantifiziert, können Defizite und Chancen erkannt und das Verhalten steuernde Maßnahmen entworfen werden. Mit deren Hilfe wird ungewollten Entwicklungen entgegengesteuert. Junge Erwachsene stellen aufgrund ihrer sehr unterschiedlichen Phasen im Lebenszyklus, z. B. gerade anstehender oder abgeschlossener Ausbildung, Umzug in eine eigene Wohnung, Familiengründung, Neuorientierung in Arbeitsroutinen oder das Einleben in ein anderes Lebensumfeld einer fremden Stadt, intuitiv eine sehr heterogene Gruppe dar. Die Modellierung des Verhaltens ist für diese Altersgruppe besonders schwierig. Aus der Komplexität dieser Problemstellung heraus ist ersichtlich, dass fundierte Analysen zur Mobilität junger Erwachsener notwendig sind, um verkehrsplanerische Defizite aufzudecken und Chancen zu erkennen. Der methodische Schwerpunkt des Beitrages liegt auf der Bildung einer Typologie des Verkehrsverhaltens junger Erwachsener. Die verwendete Datengrundlage ist das „Deutsche Mobilitätspanel – MOP“. Dabei wird der Versuch unternommen, zunächst Variablen aller relevanten Dimensionen des handlungsorientierten, aktivitätsbasierten Verkehrsverhaltens zusammenzustellen und für eine entsprechende Analyse aufzubereiten. Im Anschluss werden geeignete und in den Sozialwissenschaften erprobte Verfahren zur Ähnlichkeitsmessung eingesetzt, um möglichst verhaltensähnliche Personen zu typologisieren. Im Weiteren finden konfirmatorische Analysetechniken Anwendung, mit deren Hilfe Verhaltenshintergründe erklärt und inferenzstatistisch geprüft werden. Als Ergebnis wird eine clusteranalytische Typologisierung vorgestellt, die im Anschluss anhand soziodemografischer Indikatoren und raumstruktureller Kriterien der Lagegunst beschrieben wird. Aufgrund der gewonnenen Erkenntnisse können objektive und im Idealfall quantifizierbare, d. h. prognosefähige Merkmale zur Bildung verkehrssoziologischer und weitgehend verhaltensähnlicher Personengruppen genutzt werdenOver the last few decades of mobility research, a wide base of knowledge for understanding travel determinants and causal relationships in mobility behavior has been established. The development of travel models was at first of interest primarily to economists and econometricians as well as transportation engineers. They were soon joined by other scientific areas such as psychology or the geosciences, which as a result increasingly addressed the theme of mobility and used quite different methodologies and criteria for explaining human behavior. Today, activity-oriented approaches generally attempt to determine individual-level factors that provide information on behavioral variability within the population, thereby contributing greatly to explaining variances. If explanatory factors can be properly identified and quantified, then deficiencies and opportunities can be recognized and measures for influencing behavior can be conceptualized. With their help, undesirable developments can be avoided. Because of their highly differing stages in life, e.g. upcoming or recently completed education, moving into their own apartment, starting a family, becoming oriented in a work routine or adapting to a new environment in a different city, young adults are intuitively a very heterogeneous group. Modeling the behavior of this age group is particularly difficult. This problem makes it clear that founded analysis of the mobility of young adults is necessary in order to recognize deficiencies and opportunities in transportation planning. The methodological focus of this work is on creating a typology of young adults’ travel behavior. The base data is from the “Deutsches Mobilitätspanel – MOP” (German Mobility Panel). An attempt is made to gather and prepare all relevant dimensions of decision-oriented, activity-based travel behavior for a corresponding analysis. Afterward, appropriate and proven methods from the social sciences are used to test for similarity in order to identify groups of persons which are as behaviorally homogeneous as possible. In addition, confirmatory data analysis is utilized which helps explain and test, through inferential statistics, determinants of behavior. The resulting typology from the cluster analysis is presented and followed by a description using sociodemographic indicators and spatial criteria of accessibility. The findings make it possible to use objective and, ideally, quantifiable and therefore forecastable characteristics for identifying sociological population groups within which similar travel behavior is displayed
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Jansen, Dina (Dieneke) Susanna. "The body upgrade aesthetics, value judgements and forces of choice : thesis submitted to the Auckland University of Technology in partial fulfilment of the degree - Masters of Art (Art and Design), 2004." Full thesis. Abstract, 2004.
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Aldebert, Clément. "Uncertainty in predictive ecology : consequence of choices in model construction." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4075/document.
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Les systèmes écologiques sont des systèmes complexes qui ne peuvent pas être d´écrits par un unique modèle mathématique. De nombreux modèles peuvent être construits pour un même système, selon les internets du modélisateur et ses choix dans la construction du modèle. Quel est l’impact de ces choix dans la construction du modèle sur les prédictions de la dynamique des systèmes écologiques et les informations qu’elles fournissent sur la résilience de ces systèmes est la question générale qui guide le travail présente dans cette thèse. Cette thèses focalise sur un choix entre formulations de modèle basées sur des mécanismes biologiques et qui décrivent les données empiriques avec la même efficacité. Ces modèles sont proches l’un de l’autre, donc on s’attendrait `a ce que leurs prédictions soient similaires. Cependant, nous montrons avec un exemple générique de modèle prédateur-proie que des formulations similaires du processus de prédation peuvent prédire des dynamiques qualitativement différentes en terme de: (i) nombre et type d'états stables, et (ii) réponse et résilience du système face à une perturbation extérieure. Ces différences dans les prédictions du modèle sont expliquées par une analyse mathématique détaillée du modèle prédateur-proie. Ensuite, ce modèle est étendu à des réseaux trophiques compos´es de dizaines d’espèces. La complexité de ces réseaux (nombre d'espèces et d’interactions) explique leur persistance, alors que leur dynamique temporelle est fortement affectée par la fonction utilisée pour modéliser la prédation. Des méthodes sont ´également proposées pour quantifier la sensibilités d’un modèle. Finalement, nous montrons que si un minimum de détails biologiques sont pris en compte, des modèles prédateurs-proies sont moins sensibles `a la formulation de la prédation. Ceci nous donne des pistes pour gérer les incertitudes dans la construction d’un modèle, qui sont intrinsèques à la complexité des systèmes naturelsEcological systems are complex systems which cannot be described by a single mathematical model. Multiple modelsof a same system can be built, depending on modeller’s interests and on its choices during model construction. Howfar these choices in model construction can affect the predicted dynamics of ecological systems and the informationthey provide on their resilience? is the general question that leads the research presented in this thesis. This thesisfocuses on a choice between model formulations that are based on biological mechanisms and describe empiricaldata with the same accuracy. These models are close to each other, so they are expected to predict similar systemdynamics. However, we show through a generic example of predator-prey model that similar formulations of thepredation process can predict qualitatively different system dynamics in term of: (i) number and type of stablestates, and (ii) system response to external disturbance and its potential for recovery. These differences in modelpredictions are explained by a detailed mathematical analysis of the predator-prey model. Next, this model isextended to complex food webs made of tens of species. The complexity of these networks (number of species andinteractions) drives their persistence, whereas their temporal dynamics is strongly affected by the function used tomodel predation. Methods to quantify model sensitivity are also proposed. Finally, we show that if a minimumlevel of biological details is included, predator-prey models are less sensitive to predation formulation. This providea clue to deal with uncertainties in model construction, which are intrinsic to the complexity of natural systems
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Guez, Marilyn. "L'extinction du jugement civil, contribution à l'étude des effets de l'acte juridictionnel." Thesis, Paris 1, 2017. http://www.theses.fr/2017PA01D070.
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L'extinction du jugement civil désigne la privation des effets de l'acte juridictionnel, à la fois rouage technique commun aux différents procédés techniques extinctifs et moment choisi de la vie du jugement civil. La présente étude, qui propose une approche systématique des procédés techniques extinctifs, par la mise en lumière de leurs finalité et technique juridique, démontre leur irréductible diversité et leur complémentarité technique dans le droit du procès, qu'ils soient liés à une remise en cause de la chose jugée, à l'instar des voies de recours ou, au contraire, qu'ils soient indépendants d'une telle remise en cause, telle la prescription de la force exécutoire ou la caducité. L'analyse critique de la portée de l'extinction invite à vérifier, au-delà du jugement contentieux qui tranche définitivement en présence des parties leurs prétentions respectives et qui constitue l'archétype de l'acte juridictionnel, la résilience normative des autres jugements civils, en particulier des jugements provisoires et gracieux. Mis en lumière à partir des conditions plus ou moins restrictives auxquelles ces jugements civils peuvent être privés de leurs effets, leur degré variable de résistance à l'extinction à titre principal, dans le cadre des voies de recours, et à titre incident, en dehors d'elles, illustre les nuances de la force normative de ces autres jugements civils. La portée de l'extinction est encore révélatrice de la résilience des effets secondaires de l'acte juridictionnel. Elle est une mise à l'épreuve de leur qualification qui, jusqu'à présent, semble avoir été pensée sans autre perspective que la naissance du jugement civil et la permanence de ses effetsThe extinguishment of a civil judgment refers to the cancellation of the judgment’s effects, which is both a technical cog common to the various extinguishing technical processes and a crucial moment in the life of a civil judgment. This study, which proposes a systematic analysis of the extinguishing technical processes, by highlighting their purpose and legal technique, shows their irreducible diversity and technical complementarity in civil procedure, whether they involve challenging the res judicata (i.e. legal remedies) or not (i.e. time-barring of enforcement or lapsing). The critical analysis of the scope of the extinguishment entails checking, beyond the contentious judgment which definitively resolves the parties' respective claims (archetype of the civil judgment), the normative resilience of other civil judgments, in particular provisional and non-contentious judgments. The variable degree of resistance of the effects of civil judgments to their extinguishment, whether achieved via legal remedies or by other means, is highlighted by a consideration of the more or less restrictive conditions in which the judgments are deprived of their effects. This illustrates the nuances of the normative force of said civil judgments. The scope of the extinguishment is also indicative of the resilience of the secondary effects of the civil judgment. Examining such scope enables one to test the classification of the secondary effects which seem to have been considered so far only from the perspective of the issuance of the civil judgment and the permanence of its effects
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Nguyen, Tien Dien. "Le formalisme en matière contractuelle dans les droits français et vietnamien." Thesis, Paris 2, 2011. http://www.theses.fr/2011PA020081/document.
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Tandis que le formalisme juridique constitue un thème fréquent en droit français, une telle recherche fait défaut en droit comparé. En effet, le thème est habituellement présenté sous l'angle de ses manifestations variées. En conséquence, une étude globale sur le formalisme du contrat en droits français et vietnamien nous permet de mieux connaître ses caractéristiques dans chaque système juridique. Le formalisme peut être fréquemment envisagé comme une règle juridique en vertu de laquelle la formalité est exigée par la loi pour la validité ou l’efficacité d’un contrat. Il s’impose à la conclusion du contrat. A cet égard, il serait une exception au consensualisme. Mais depuis quelques décennies, le formalisme ne cesse de se propager en droit moderne, notamment en droit de la consommation. Ce phénomène semble d’autant plus paradoxal que le principe du consensualisme domine en droit moderne. Avec ce développement du formalisme, une série de questions affleure : quels sont ses caractéristiques en droits français et vietnamien ? Les deux systèmes présentent-ils des caractères communs ? Quelle place le formalisme occupe-t-il en droit moderne : est-il considéré comme une exception au consensualisme ou comme un instrument légal de sécurité juridique ? Cette recherche a ainsi pour finalité de répondre à toutes ces questions. Elle est articulée en deux parties. Dans la première partie, il s’agit du formalisme accentué dont la formalité s’impose pour la validité ou l’existence du contrat. Dans la deuxième partie, il s’agit du formalisme atténué : la formalité est requise pour l’efficacité du contratPas de résumé en anglais
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Podlešáková, Markéta. "Kvalifikační struktura obyvatelstva versus nezaměstnanost v ČR." Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-4324.
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The economic policy of the Czech Republic is battled with rigidities of labour market, which decline its flexibility. One of this rigidities is inconvenient structure of potential skilled labour force. This thesis is also aimed at its analysis compared with actual needs of labour market. In theoretical part of this thesis are presented characteristics of the Czech educational system and qualification structure of population. The practical part is dedicated to the labour market -- its needs and discrepancies between suply and demand, which are caused by inconvenient qaulification structure of population. The pivot of this thesis is emphasis on lifelong learning, which is getting necessity today. As a result of this thesis are suggestions of possible solutions to shortage of skilled labour force.
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Andersson, Lina (current name Aldén Lina). "Essays on economic outcomes of immigrants and homosexuals." Doctoral thesis, Växjö universitet, Ekonomihögskolan, EHV, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-6010.
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This thesis consists of five essays on the economic outcomes of immigrants and homosexuals on the labour and housing market. Essay I evaluates the effect of an in-work benefit on the labour supply of single immigrant women by means of simulation. Although, on average, there is no significant effect, we find that the in-work benefit increases the working hours of single women with low incomes and slightly decreases the working hours of those with high incomes. The increase in working hours is primarily a result of increased participation. As expected, the positive effect is largest for the immigrant groups with the lowest participation rates and lowest labour incomes. Essay II studies intergenerational transmissions in self-employment. The results show that immigrants transfer general human capital over three generations in the sense that individuals whose fathers and grandfathers are self-employed have a higher self-employment propensity. For natives, only the father’s self-employment affects the son’s probability of becoming self-employed. Furthermore, the results show that natives transfer specific human capital from father to son, which increases the probability of sons becoming self-employed in the industry in which their fathers are self-employed. Essay III explores the effect of self-employment experience on subsequent earnings and the employment of male and female immigrant wage earners. We find that, relative to continued wage employment, self-employment is associated with lower earnings and difficulties in returning to paid employment for both immigrant men and women. The effect is less severe for natives. Among immigrant groups, the results give little support that self-employment experience improves earnings and employment prospects compared to experience from wage employment. Essay IV applies a field experiment to investigate how increasing the information about applicants affects discrimination against male Arab/Muslim applicants on the rental housing market. The Arab/Muslim applicants received fewer responses from the landlords than did the Swedish applicants. All of the applicants gained by providing more information about themselves, but the magnitude of discrimination against the Arab/Muslim applicants remained unchanged, indicating that increasing the amount of applicant information will not reduce discrimination. Essay V studies possible discrimination against lesbians in the rental housing market using a field experiment. We let two fictitious couples, one heterosexual and one homosexual, apply for vacant apartments on the Internet. We then explored if there were differences in callbacks, invitations to further contact and/or showings. The results show no indication of differential treatment of lesbians by landlords.
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Deuber, Odette [Verfasser], Gunnar [Akademischer Betreuer] Luderer, Robert [Akademischer Betreuer] Sausen, Michael [Akademischer Betreuer] Ponater, and Ottmar [Akademischer Betreuer] Edenhofer. "Metric choice for trading-off short- and long-lived climate forcers : a transdisciplinary approach using the example of aviation / Odette Deuber. Gutachter: Ottmar Edenhofer ; Robert Sausen. Betreuer: Gunnar Luderer ; Robert Sausen ; Michael Ponater." Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1066162093/34.
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Vuillemin, Anne. "Quantification de l'activité physique passée : mesure et rôle pronostique sur l'état de santé (masse osseuse et fonction musculaire)." Nancy 1, 1998. http://docnum.univ-lorraine.fr/public/SCD_T_1998_0273_VUILLEMIN.pdf.
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La quantification de l'activité physique et sportive contribue à mettre en évidence le rôle déterminant des activités physiques et de leurs conditions de pratique dans le processus du vieillissement humain. Une revue de la littérature révèle d'une part l'existence de nombreux questionnaires d'évaluation de l'activité physique sur des périodes de temps courtes, mais pour la plupart élaborés en langue anglaise, et d'autre part le manque d'instruments visant à évaluer l'activité physique sur des périodes de temps longues. Ce constat nous a conduit à adapter un questionnaire anglo-saxon destiné à apprécier l'activité physique des 12 derniers mois et à concevoir un système de quantification de l'activité physique sur la vie entière assisté par ordinateur (QUANTAP). L'application du système QUANTAP dans le domaine de la santé, notamment la masse osseuse et la force musculaire, permet d'étudier le rôle pronostique de l'activité physique. La pratique d'une activité physique au cours de la jeunesse est associée à une densité minérale osseuse de la colone lombaire alors que la densité osseuse du col fémoral semble être influencée par une pratique sportive plus récente. La conservation d'une force musculaire élevée est associée à une pratique sportive au cours de la vie entière.
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Zajdela, Basile. "L'autorité de la chose jugée devant l'arbitre du commerce international." Thesis, Paris 1, 2015. http://www.theses.fr/2015PA010276.
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L’autorité de la chose jugée est consubstantielle à l’idée même de justice. Si l’arbitrage est une justice privée et contractuelle mais une «justice quand même», elle doit logiquement composer avec l’autorité de la chose jugée. Il faut d’abord que les décisions issues de cette justice puissent bénéficier d’une telle autorité ; il faut ensuite que les juridictions arbitrales respectent l’autorité des décisions qui ont été rendues antérieurement. C’est ce second point qui est le cœur de notre étude.Du point de vue de l’arbitre du commerce international, la question de l’autorité des décisions, qu’elles soient arbitrales ou étatiques, présente des difficultés originales qui tiennent, pour l’essentiel, à la position autonome de l’arbitre. Investi d’une mission juridictionnelle ponctuelle par la volonté des parties, l’arbitre n’est a priori pas tenu par les considérations relatives à la cohérence d’un ordre juridique précis, à la paix sociale, à la bonne administration de la justice… Autrement dit, le seul caractère juridictionnel de sa mission ne lui impose pas nécessairement la prise en compte de la chose précédemment jugée. Tout bien analysé, il s’avère que c’est la volonté des parties à l’arbitrage qui conduit l’arbitre à reconnaître la normativité des décisions puis à leur attribuer une certaine autorité, à cette fin, il devra d’abord s’assurer de leur régularité avant de s’interroger sur l’étendue de leur autorité.Le fondement subjectif de l’obligation pour l’arbitre de respecter l’autorité de la chose déjà jugée et l’absence de contrôle étatique conduisent toutefois à reconnaître à l’arbitre une vaste liberté dans le choix des règles ou principes applicables. Nous verrons toutefois qu’à condition de distinguer les différentes formes empruntées par l’autorité de la chose jugée, le traitement de l’autorité de la chose jugée par les arbitres internationaux, s’il n’est pas homogène, est loin d’être aussi chaotique que l’on pourrait le croire, mieux encore, il apparaît que des pratiques raisonnables peuvent souvent être distinguéesThe force of res judicata is consubstantial with the very idea of justice / is an integral part of the idea of justice. If arbitration is private and contractual justice – but “justice nonetheless” – it logically needs to deal with the force of res judicata. Firstly, the decisions issued by arbitrators need to benefit from this force; secondly; arbitral tribunals need to respect the force of previous judicial decisions. Our study focusses on the latter aspect. From the point of view of the international commercial arbitrator, the question of the res judicata effect of arbitral or court decisions poses interesting questions and presents challenges, primarily with regards to the autonomous position of the arbitrator entrusted with an ad hoc judicial task in accordance with the intention of the parties, the arbitrator is not a priori bound to considerations regarding the coherence of a specific legal order, social peace or the sound administration of justice… In other words, the jurisdictional character of the arbitrators’ mission alone does not necessarily force them to take into account the force of res judicata. All things considered, it appears that it is the intention of the parties in the arbitration process which leads the arbitrator to acknowledge the normativity of the decisions, and to attribute them a certain force. To this end, the arbitrator will be required to check their conformity before reflecting upon the scope of their force. The subjective basis for the arbitrator’s obligation to respect the force of res judicata and the absence of state control nevertheless invite to consider the arbitrator’s significant amount of leeway in choosing which rules and principles to apply. However, we will show that, provided that a distinction is made between the different forms taken by the force of res judicata, the treatment of the force of res judicata by international arbitrators, if not exactly homogeneous, is far from being as chaotic as one might think, indeed, it appears that reasonable practices can even be observed
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Neuman, Emma. "Essays on Segregation, Gender Economics, and Self-employment." Doctoral thesis, Linnéuniversitetet, Institutionen för nationalekonomi och statistik (NS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-44556.
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This thesis consists of four empirical essays on the topics of ethnic segregation, gender economics, and self-employment. Essay I investigates how the residential mobility of Sweden's native population contributes to ethnic segregation, by applying regression discontinuity methods. The results show that the growth in the native population in a neighbourhood discontinuously drops as the share of non-European immigrants exceeds the tipping point. Tipping is driven by the departure of natives and their avoidance of tipped neighbourhoods. Tipping behaviour is selective in the sense that highly educated and high earning natives are more likely to leave neighbourhoods that have tipped. Essay II studies the relationship between the childhood neighbourhood's ethnic composition and economic outcomes in adulthood for second-generation immigrant sand natives. The results reveal that a high concentration of immigrants in aneighbourhood is associated with a lower probability of second-generation immigrants continuing to higher education. Natives' earnings and educational attainment are negatively correlated with, and the probability of social assistance and unemployment are positively associated with a high immigrant concentration. Among non-Nordic second-generation immigrants, reliance on social assistance and unemployment are negatively correlated with the share of co-ethnics and positively associated with the proportion of other ethnic groups. Essay III explores the role of social norms and attitudes about gender for labour market outcomes of immigrant men and women in Sweden. The results show that immigrants originating from countries with large gender disparities in labour force participation also have large gender gaps in labour force participation within their immigrant group on the Swedish labour market. In contrast, source country gender differences in earnings are not correlated with gender gaps in earnings within immigrant groups in Sweden. In addition, gender gaps in labour force participation among immigrants assimilate towards the corresponding gap among natives as time inSweden increases. Essay IV empirically tests the Jack-of-all-trades theory, which states that individuals who are more balanced in their abilities are more suitable for self-employment. Using Swedish Military Enlistment data, a measure of balance in endowed abilities is constructed and this balance measure is, in relation to previous research, less likely tobe endogenous. The results support the Jack-of-all-trades theory, in the sense that propensity for being or becoming self-employed is greater for individuals with abalanced set of abilities. In addition, earnings from self-employment tend to be higher among individuals with a balanced set of skills.