Дисертації з теми "Orientation sensitivity"
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1
Croxton, Craig A. "The effects of target orientation on the dynamic contrast sensitivity function." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-09052009-040820/.
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2
Smith, Douglas Eliot. "Geomagnetic sensitivity and orientation in eastern garter snakes (Thamnophis sirtalis) /." View online ; access limited to URI, 2002. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3053123.
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3
Burke, Maria Bennett Milton J. "Befriending difference intercultural sensitivity training for ministers /." Online full text .pdf document, available to Fuller patrons only, 2001. http://www.tren.com.
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4
Love, Edwin. "Innovation in context : the effect of diminishing sensitivity, reference dependence, and goal orientation on consumer acceptance of new features /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/8833.
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Wagge, Jordan Rose. "Contributions of response gain and contrast gain to human spatial pattern masking." Oxford, Ohio : Miami University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1250003782.
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Turner, Joan C. "Maternal sensitivity and mother-child mutual orientation as mediators of the effects of minor illness on toddler social emotional development /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3060149.
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Hopkins, Gregory Robert II. "Contrast sensitivity and vision-related quality of life assessment in the pediatric low vision population." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397751785.
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Shaheen, Stephanie. "The effect of pre-departure preparation on student intercultural development during study abroad programs." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1091481152.
Повний текст джерелаАнотація:
Thesis (Ph. D.)--Ohio State University, 2004.Title from first page of PDF file. Document formatted into pages; contains viii, 215 p.; also includes graphics. Includes bibliographical references (p. 204-215).
9
Edwards, Tyler A. "A Parametric Study of Stack Performance for a 4.8kW PEM Fuel Cell." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1275667559.
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Воробйов, Сергій Ігорович, Сергей Игоревич Воробьев, О. V. Shutylieva, Анатолій Миколайович Чорноус, Анатолий Николаевич Чорноус та Anatolii Mykolaiovych Chornous. "The Dependence of the Magnetoresistance on the Orientation of Three-layer Film Systems Based on Со / n / Со (n = Gd, Dy, Bi) in an External Magnetic Field". Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35349.
Повний текст джерелаАнотація:
This work is devoted to general laws influence the orientation of the samples in an external magnetic
field on the magnetic and magnetoresistive properties of three-layer film systems based on Со / n / Со
(where n is intermediate layer of Gd, Dy and Bi). Found that the field dependence has anisotropic
character, and most important magnetoresistance is observed in the perpendicular geometry measurement
for all three-layer film systems. It is shown that the value of the coercive force and magnetoresistance
decreases and the value of film sensitivity to the magnetic field increases in the transition from
perpendicular to the transverse geometry.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35349
11
Soong, Grace Pik-Yin. "The effect of orientation and mobility training on vision and mobility performance in visually impaired adults." Thesis, Queensland University of Technology, 2000. https://eprints.qut.edu.au/36754/1/36754_Digitised%20Thesis.pdf.
Повний текст джерелаАнотація:
A number of studies have investigated various visual functions of visually impaired subjects and how their visual functions relate to the subjects' ability to travel in their environment. Most studies have shown that visual field and contrast sensitivity are the most important visual factors in determining how well visually impaired subjects travel in their environment. From the outcome of the studies, some aspects of vision are known to play important roles in mobility performance of visually impaired subjects. However, in all these studies, researchers have used visually impaired subjects with differing degrees of mobility skills. The mobility performance measured in previous studies may differ among subjects depending on the level of their mobility skills rather than differences in visual function. One of the main factors which may affect subjects' mobility skills is whether or not they have had orientation and mobility (O&M) training. Anecdotal evidence reported by mobility instructors and visually impaired clients suggests that O&M instruction does improve independent travel skills. In view of the limitations of previous studies, the current study attempted to determine the effect of O&M training on vision and mobility performance of visually impaired adults. Vision and mobility performance of a group of visually impaired subjects were examined before and after O&M training. As the same group of subjects were investigated, the effects of other factors which influenced their mobility skills may be controlled. Based on the best predictors of mobility performance, vision criteria for O&M training referral were recommended. Methods. Vision and mobility performance of 2 groups of visually impaired subjects with various ocular diseases were assessed: the experimental group T who were referred and received mobility training and the control group NT with no previous mobility training and were not referred for training. Visual performances were measured binocularly as high and low contrast visual acuities, letter and edge contrast sensitivities and kinetic visual fields. The subjects' mobility performance was measured on an indoor mobility course: 1) walking efficiency was assessed as percentage preferred walking speed (PPWS) 2) mobility incidents were assessed as errors made during travel on the course. Vision and mobility performances were measured before training and approximately 4 weeks after completion of training for group T whilst group NT was assessed at two visits with a similar time period between visits as for group T. A questionnaire was administered to each group at both visits and six months after the second visit. Results. Walking efficiency of group T improved with short-term practice immediately following O&M training but there was no improvement due to long-term practice or training. On the other hand, there was no improvement in error score either due to practice or training immediately after O&M training. Error score of all subjects improved as a result of prior experience. Self-reported mobility performance did not improve immediately after O&M training but improved six months after training. Stepwise multiple regression analysis showed that visual field was a significant predictor before and after O&M training; it accounted for 20.4 percent and 31.2 percent of the variance in PPWS and error score respectively before training whilst accounting for 20.0 percent and 16.8 percent of the variance in PPWS and error score respectively after training. Stepwise multiple regression analysis of groups T and NT together showed that LCV A and inferior remaining visual field were best predictors of PPWS and error score respectively; PPWS began to deteriorate when LCVA was 6/150 or worse whilst error score began to decline when inferior remaining visual field was 45 degrees radius or less (between the field extent of 225 and 315 degrees). Conclusions. Mobility performance of visually impaired adults may be improved following O&M training, however, further research needs to be conducted to ascertain the level of improvement in performance over time. Visual field was shown to play a significant role in mobility performance of visually impaired adults regardless whether or not they have had O&M training, however, further research is required to ascertain the role of LCV A in walking efficiency. Tentative criteria for O&M training referral were recommended: LCVA 61150 or worse and/or inferior remaining binocular visual field of 45 degrees or less using the target IV 4 E.
However, further research is needed to ascertain if these criteria are applicable to other visually impaired groups.
12
McKay, Ian Ross. "Assessing orientations to cultural difference of the faculty of a university foundation programme in the Gulf Cooperation Council : a mixed-methods approach informed by the Intercultural Development Continuum and using the Intercultural Development Inventory." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/13781.
Повний текст джерелаАнотація:
This study examined the orientations to cultural difference of sojourner educators in the Foundation Program at Qatar University to determine if orientations were correlated with select demographic and experiential variables, including gender, age, time overseas, education level, formative region, ethnic minority status, job position, length of time in Qatar, intercultural marriage, default language, formal teacher training, and overseas development organization experience. This study used a sequential mixed-method design. Perceived and Developmental Orientations were measured using the Intercultural Development Inventory© (V.3), which produced a measure of each respondent’s orientation to cultural difference. Focus group interviews were conducted to engage participants in explaining and interpreting the findings. Five focus groups of three to six participants each were conducted. Most of the teachers were found to operate from within the transitional orientation of Minimization, although individual scores ranged from Denial to Adaptation. On average, the educators were found to overestimate their orientations by 31 points. A positive correlation between orientation and formative region was found, with participants from North America showing the highest orientation. Statistically significant differences emerged for orientations when comparing Middle East and North African (MENA) and North American formative regions. Formative region was found to account for 4.8% of the variance in orientation and is a significant fit of the data. Focus groups participants speculated that (a) core differences regarding multiculturalism in MENA and North American cultures help explain the results, (b) aspects of the workplace culture and both the broader MENA and local Qatari culture encourage a sense of exclusion, and (c) external events further complicate cross-cultural relations. The study findings add to the literature by providing baseline orientation data on sojourner educators in post-secondary education in the GCC region, and by confirming some of the findings of similar studies. The study provides practitioners with suggestions for staffing and professional development. Future research should focus on the measurement of orientations in broader samples of educators, changes in orientation over time in Qatar and other cultural contexts, differences in orientation among short-term vs. long-term expatriates, the impact of employment systems and societal structures on orientations in sojourner educators, the impact of educator orientation to cultural difference on student achievement, and the design of effective cross-cultural professional development for educators.
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Venkataraman, Abinaya Priya. "Vision Beyond the Fovea: Evaluation and Stimuli Properties." Doctoral thesis, KTH, Biomedicinsk fysik och röntgenfysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191212.
Повний текст джерелаАнотація:
This research is about evaluating vision in the periphery. Peripheral vision is of fundamental importance in the performance of our everyday activities. The aim of this thesis is to develop methods suitable for the evaluation of peripheral vision and to assess how different visual functions vary across the visual field. The results have application both within the field of visual rehabilitation of people with central visual field loss (CFL)and as well as in myopia research. All methods for assessing peripheral vision were implemented with adaptive psychophysical algorithms based on Bayesian statistics. A routine for time-efficient evaluation of peripheral contrast sensitivity was implemented and verified for measurements out to 30° in the visual field. Peripheral vision was evaluated for different properties of the stimuli: sharpness, motion, orientation, and extent. Optical quality was controlled using adaptive optics and/or corrective spectacles specially adapted for the peripheral viewing angle. We found that many peripheral visual functions improved with optical correction, especially in people with CFL. We also found improvements in peripheral contrast sensitivity for low spatial frequencies when stimuli drifted at 5 to 10 Hz; this applies both for people with normal vision and those with CFL. In the periphery, it is easier to see lines that are oriented parallel with respect to the visual field meridian. We have shown that this directional bias is present for both resolution and detection tasks in the periphery, even when the asymmetric optical errors are minimized. For accurate evaluation of peripheral vision, we therefore recommend using gratings that are oriented oblique to the visual field meridian. The directional bias may have implications in how peripheral image quality affects myopia progression. Another proof that peripheral vision can influence central visual function is the fact that, when the stimulus extent was increased beyond the fovea, the blur in the stimulus was less noticeable.Denna forskning handlar om att utvärdera synen i periferin. Vår perifera syn är ovärderlig i det dagliga livet. Målsättningen med denna avhandling är dels att utveckla metoder speciellt lämpade för perifer synutvärdering och dels att mäta hur olika synfunktioner varierar över synfältet. Resultaten har tillämpning både inom synrehabilitering för personer med centraltsynfältsbortfall och inom närsynthetsforskning. Adaptiv psykofysisk metodologi baserad på Bayesiansk statistik användes vid all utvärdering av det perifera seendet. Vi implementerade en rutin för tidseffektiv mätning av perifer kontrastkänslighet och verifierade den ut till 30° i synfältet. Den perifera synen utvärderades för olika egenskaper hos objektet: skärpa, rörelse, riktning och utbredning. Skärpan kontrollerades med hjälp av adaptiv optik och/eller glasögonkorrektion speciellt anpassad för den perifera synvinkeln. Vi fann att många periferasynfunktioner förbättras av optisk korrektion, särskilt för personer med centralt synfältsbortfall. Vi hittade även förbättringar i periferkontrastkänslighet för låga ortsfrekvenser när objektet modulerades med hastigheter mellan 5 och 10 Hz, vilket gäller både normalseende och personer med centralt synfältsbortfall. I periferin är det lättare att se linjer som är orienterade parallellt med synfältsmeridianen. Vi har visat att denna riktningsbias gäller både för upplösning och detektion i periferin, även när de asymmetriska optiska felen minimeras. För bästa mätnoggrannhet rekommenderar vi därför att använda randmönster som ligger snett relativt synfältsmeridianen. Denna riktningsbias skulle även kunna påverka hur den perifera bildkvalitén inverkar på utvecklingen av närsynthet. Ytterligare ett bevis för att perifer syn kan påverka den centrala synfunktionen är att, när objektets utbredning ökades, uppfattade personen det som mindre suddigt.
QC 20160826
14
Hassan, Shirin E. "Vision and mobility performance of subjects with central and peripheral visual field loss." Thesis, Queensland University of Technology, 2000. https://eprints.qut.edu.au/36755/1/36755_Digitised%20Thesis.pdf.
Повний текст джерелаАнотація:
Differences in orientation and mobility of people with different types of visual impairment have received little attention in the literature. Typically, studies have assessed the mobility performance of either a heterogenous group of subjects with low vision (ie. mixed ocular diseases) or a homogenous group of subjects with a particular eye disease (E§ Retinitis Pigmentosa: RP). There have been few investigations of both mobility performance and vision determinants of mobility in subjects with central visual field (VF) loss. Similarly, mobility performance and its relationship with vision of subjects with contrasting types of VF loss have not been systematically investigated. The work described in this thesis aims to provide a better understanding in these areas.
The first study compared the vision and mobility performance of subjects with central VF loss, modelled through Age-related Macular Degeneration (ARMD), and subjects of similar age with normal vision. Elderly subjects with ARMD, when considered as a homogenous group, had no more difficulty with mobility than the normal vision subjects. This was true for both the efficiency (speed) and safety (errors) aspects of mobility performance. The height and luminance of objects did not affect the number of errors made by central VF loss subjects. The sub-group of central VF loss subjects with an absolute binocular scotoma had significantly more difficulty with mobility than the normally sighted subjects. The significance of a binocular scotoma was further demonstrated through the results of the vision determinants of mobility performance. VF measures, relating directly or indirectly to the presence or size of a binocular scotoma, emerged as the best predictors of mobility performance.
The second study compared the vision and mobility performance of subjects with peripheral VF loss, modelled through RP, and subjects of similar age with normal vision. Peripheral VF loss subjects had significantly impaired mobility compared to normal vision subjects. This was evident in both the efficiency (speed) and safety (errors) aspects of mobility performance. In particular, the peripheral VF loss subjects found low luminance and inferiorly- and superiorly-placed objects hazardous while navigating through the mobility course. Residual VF measures related to the central 10° radius VF zone emerged as significant predictors of mobility performance.
The third study compared the vision and mobility performance of subjects with central and peripheral VF loss. The results of this study showed that, unlike central VF loss, peripheral VF loss was associated with decreased mobility performance. Peripheral VF loss subjects, despite being younger, walked significantly slower and made mo~e errors than the central VF loss subjects. Other differences in mobility performance between the contrasting VF loss groups included the impact of object luminance and position. Similarities in performance included the benefits of familiarity with the course and the degradation of performance under conditions of glare and reduced illumination. Again the importance of the central 10° radius VF for mobility was shown, these VF measures being the best predictors of mobility performance for both VF loss groups.
Another aim of this work was to develop and assess the effectiveness of VF scoring based on cortical magnification. Despite the fact that these methods of VF scoring emphasise the central VF, which was shown to be a significant predictor of mobility performance, these methods did not emerge as better determinants of mobility performance than conventional VF scoring methods. This may be a consequence of the available equations and measurement errors associated with kinetic VF measurement.
The work described in this thesis provides an improved understanding of the mobility performance and its relationship with vision in low vision subjects with contrasting types of VF loss. The results of these experiments lead to recommendations relating to the vision assessment and referral criteria of low vision patients. Since many determinants of mobility performance related to the central 10° radius VF zone, future work should aim to improve VF measurement and scoring methods including scoring techniques based on cortical magnification, where central VF areas are given prominence. Other future studies should evaluate the vision and mobility performance of low vision subjects with a greater number of forms of VF loss to extend on the work reported in this thesis.
15
Liu, Geniva. "Sensitivity to 3D orientation in textured surfaces." Thesis, 2001. http://hdl.handle.net/2429/11832.
Повний текст джерелаАнотація:
The present study investigated depicted 3D orientation in texture gradients as a potential feature
to represent data attributes in scientific visualization applications. The task was to detect and/or
localize texture elements that varied across two components of 3D orientation, theta (left-right
orientation differences from y-axis) and phi (rotation about the y-axis). Experiment 1 determined
observers' detection sensitivity to orientation-defined 3D targets, and revealed that detection
performance for 3D targets was based on depicted 3D orientation rather than 2D image
orientation. In Experiment 2, the detection task was followed by a localization via direct action
(pointing to an onscreen location) or indirect action (making a spatially mapped keypress).
Results showed that if targets were correctly detected, they were also localized to the visual field
quadrant, with accuracy generally being higher for direct action responses. Additionally,
observers showed an ability to localize targets that they failed to detect. Experiment 3
demonstrated that, compared to performance of the component tasks alone, detection and direct
localization did not suffer in a dual-task context, but indirect localization did. These results
support a dual visual systems theory that postulates separate processing streams that specialize in
processing visual information for action or perception. Results also have practical implications
for how 3D orientation can be used in visualization applications.
16
Choi, Woo Jin. "Essays on Consumers' Goal Orientation and Price Sensitivity." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10989.
Повний текст джерелаАнотація:
The objective of my dissertation work was to provide a better understanding of consumer choices related to these two important tradeoffs that consumers are often confronted with in the marketplace. Drawing upon regulatory focus theory, I investigated how consumers choose between price and quality or price and quantity, in each of two essays, thereby shedding light on the role of consumer goals in purchase decisions. In the first essay, I propose that quality is predominantly a promotion feature whereas price is predominantly a prevention feature. Therefore, promotion oriented consumers should be more attentive to differences in product quality whereas prevention oriented consumers should be more attentive to differences in product price. Three studies demonstrate that quality (price) is more strongly associated with a promotion (prevention) orientation, that promotion (prevention) oriented consumers prefer products with higher quality (cheaper prices), and that these preferences are mitigated when consumers do not need to prioritize between price and quality and are mediated by relative attention to quality versus price. In the second essay, I investigate the manner in which consumers' goal orientations affect their preferences for monetary versus nonmonetary promotional offers, such as bonus packs and price discounts. I propose that consumers with a promotion (vs. prevention) orientation are more likely to prefer a bonus pack offer over an economically equivalent price discount offer. Two pretests and one study provide empirical support for this key prediction. I also identify theoretically defensible and managerially actionable boundary conditions for this effect that are related to price levels and product types.
17
Orprecio, Jazmine. "Perception of faces by 6-month old infants : sensitivity to geometric variability and orientation /." 2004. http://wwwlib.umi.com/cr/yorku/fullcit?pMQ99368.
Повний текст джерелаАнотація:
Thesis (M.A.)--York University, 2004. Graduate Programme in Psychology.Typescript. Includes bibliographical references (leaves 40-49). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ99368
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CHEN, PEI-YEN, and 陳沛言. "Learning Matters in Intercultural Setting: The Relationships Among Learning Goal Orientation, Cultural Intelligence, and Intercultural Sensitivity." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/8c4btz.
Повний текст джерелаАнотація:
碩士國立臺北大學
企業管理學系
106
The purpose of the current study was to investigate the effects of learning goal orientation (LGO) on individuals’ intercultural sensitivity with the mediating effect of cultural intelligence. We collected data from Philippine workers currently living and working in Taiwan. A pilot test was completed by 50 expatriates to ensure the reliability of the instrument, and the result was acceptable. The total amount of valid paper questionnaires were 249 copies and the percentage for valid return questionnaire was 99.6%. We adopted SEM to analyze the data and to test both direct effects and indirect effects among research variables by Mplus 7.0. In addition, we examined the mediation effect of CQ on the relationship between LGO and intercultural sensitivity. The results showed that LGO was an antecedent of an individual’s CQ and CQ had a positive effect on individual’s intercultural sensitivity. Our findings added new knowledge to the field of cross-cultural studies. The findings indicated that learning goal orientation may be the predictor of one’s CQ. Furthermore, the present study discovered that if an individual with a strong learning motivation to live and work in an intercultural environment, his/her cultural learning ability would be enhanced and take effect in generating more positive responses toward cultural differences. Furthermore, with higher sensitivity to respect different cultures would facilitate a harmonious international working and living experience.
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Bhardwaj, Vertica. "THE EFFECTS OF CONSUMER ORIENTATIONS ON THE CONSUMPTION OF COUNTERFEIT LUXURY BRANDS." 2010. http://trace.tennessee.edu/utk_graddiss/869.
Повний текст джерелаАнотація:
The emergence of ‘new luxury’ available at affordable prices has resulted in abundance of counterfeit products in the markets. As the extent of counterfeiting is increasing in almost every industry, it becomes critical to develop measures that can help to prevent buying and selling of counterfeit products. In exploring consumers’ buying behavior of counterfeit products, this study was designed to examine the influence of individuals’ characteristics or consumer orientations, both social and personal, on that generate the demand for counterfeit brands. This study employed four theoretical frameworks: (a) the Theory of Planned behavior, (b) Value-Attitude-Behavioral intention system, (c) Bandwagon effect in the theory of consumer demand, and (d) Aberrant consumer behavior.
Specifically, this study investigates consumers’ intention to purchase counterfeit brands based on their social consumer orientation (social conformity, status seeking, fashion consciousness, and price-quality schema) and personal consumer orientation (ethical value, social responsibility, and integrity), attitudes toward the purchase of counterfeit brands, subjective norm, and perceived control over the purchase of counterfeit brands. Further, this study aims to explore the role of price sensitivity as a moderator in understanding the relationship between attitudes and intentions to purchase counterfeit and original luxury brands.
This study was conducted in the context of fashion luxury brands that sell handbags and wallets. An online self-administered survey methodology was employed to collect the data from 500 subjects. The data were analyzed by maximum likelihood estimation (MLE) procedure using
structural equation modeling (SEM). Out of total 14 proposed hypotheses, 10 were significant, as expected. However, the rest 4 were not found to be significant. Status seeking was found to have an insignificant relationship with subjective norm to purchase a counterfeit brand. Fashion consciousness was found to have a negative influence on attitude while the relationship of price-quality schema with attitude was not found to be significant. Also, integrity was not found to significantly influence subjective norm. Price sensitivity did not act as a moderator due to non significant relationships between attitude and intensions to purchase counterfeit and original brands. Research and managerial implications, limitations, and suggestions for future research were drawn based on the results.
20
Liu, Chi-Kai, and 劉旭凱. "By measuring retinal sensitivity in eccentricity and Stiles-Crawford Effect to evaluate the changes of retinal receptor orientation and visual axis during accommodation." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/75370899239417637948.
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Maharaja, Gita Gopaul. "An "island" study abroad program and its impact on the intercultural sensitivity and cross-cultural adaptability of its participants perspectives from a research intensive university /." 2009. http://digital.library.duq.edu/u?/etd,106341.
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Kennedy, Graeme J., and David J. Whitaker. "The chromatic selectivity of visual crowding." 2010. http://hdl.handle.net/10454/6049.
Повний текст джерелаАнотація:
Precortical vision is mediated by three opponent mechanisms that combine receptoral outputs to form a luminance channel (L + M) and two chromatic channels, red-green (L/M) and blue-yellow (S/L + M). Here we ask the extent to which these basic color opponent mechanisms interact in the phenomenon of crowding, where nearby targets interfere with the processing of a central test target. The task was to identify the orientation of a Gabor patch while an annular plaid surrounded the patch. The radius of the annulus was varied in order to produce different separations of the test and flanker. The chromatic content of the Gabor and the annulus could be varied independently along the (L + M), (L/M), and (S/L + M) cardinal axes. For all targets, when the target and flanker shared the same chromaticity, performance decreased with decreasing separation of the target and annulus, i.e., a typical crowding effect was seen. When the test and flanker isolated different chromatic mechanisms, very little crowding was observed, even at the minimum separation of test target and annulus. In addition to this, intermediate chromaticities were found to produce intermediate levels of crowding. Finally, crowding effects using "half-wave rectified" stimuli suggest a locus for crowding effects beyond the level of color opponent mechanisms.
23
Demers, Isabelle. "L'orientation mentale maternelle : analyse des précurseurs et étude comparative de mères adolescentes et adultes." Thèse, 2009. http://hdl.handle.net/1866/6332.
Повний текст джерела
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Jeans, Rhiannon. "Form perception and neural feedback: insights from V1 and V2." Thesis, 2014. http://hdl.handle.net/1885/12731.
Повний текст джерелаАнотація:
In the brain, every cortical inter-area feedforward projection shares a reciprocal feedback connection. Despite its pervasive nature in the brain, our understanding of the functional role of neural feedback in form perception remains incomplete, particularly in behaving animals. This problem is addressed in humans with a novel form completion paradigm. Seven subjects (5 female) had their EEG waveforms analysed using three linear models showing non-significant differences between stimulus conditions designed to produce differences by manipulating neural feedback to V1. Two of these subjects (one female), in addition to EEG waveforms, had combined magnetic resonance imaging (MRI) and functional MRI (fMRI) cortical maps that allowed anatomically close areas such as V1 and V2 to have their signals decomposed and neural feedback inferred. Differences between stimulus conditions arose once signals had been divided into V1 and V2. Significant differences (p < .05) for one subject in V1 and V2 suggests cortical interactions at 100ms and 350ms. This suggests the form completion paradigm has utility at investigating the influence of the V2 far receptive field surround on V1, given future given signal to noise issues are resolved.
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Bordeleau, Stéphanie. "Comportements parentaux et autorégulation chez l’enfant : une perspective développementale." Thèse, 2012. http://hdl.handle.net/1866/8417.
Повний текст джерелаАнотація:
Étant donné que le sommeil ainsi que les problèmes intériorisés et extériorisés durant l’enfance sont associés à plusieurs aspects du développement social, affectif et cognitif de l’enfant, il apparait essentiel d’étudier ces deux indicateurs de l’autorégulation chez les enfants ainsi que de comprendre les facteurs qui contribuent à leur émergence. L’objectif général de la thèse était donc de mieux comprendre les facteurs associés au développement de l’autorégulation psychophysiologique, telle que mesurée par la qualité du sommeil de l’enfant, ainsi que l’autorégulation émotionnelle et comportementale, telle qu’indiquée par la présence de symptômes intériorisés et extériorisés chez l’enfant.
La thèse est composée de deux articles de nature empirique. L’objectif du premier article de la thèse était d’examiner les liens qui existent entre quatre comportements parentaux (i.e., la sensibilité maternelle, le soutien à l’autonomie maternel, l'orientation mentale de la mère et la qualité des interactions père-enfant) et le sommeil de l’enfant, de façon longitudinale et prospective. Les trois comportements maternels ont été mesurés avec 70 dyades mère-enfant, tandis que la qualité des interactions père-enfant a été évaluée chez 41 de ces familles. À 12 mois, l’orientation mentale maternelle et la sensibilité maternelle ont été évaluées. Le soutien à l'autonomie maternel a été mesuré à 15 mois, tandis que la qualité des interactions père-enfant a été évaluée à 18 mois. Le sommeil des enfants a été mesuré à 3 et 4 ans en utilisant un agenda de sommeil rempli par la mère. Les résultats indiquaient qu’en contrôlant pour le statut socioéconomique familial et le fait d’aller en garderie ou non, la qualité des interactions mère-enfant et père-enfant est liée à la proportion de sommeil ayant lieu la nuit chez les enfants d’âge préscolaire.
Le deuxième article visait à étudier les effets d’interaction entre le sommeil de l’enfant et la sensibilité maternelle en ce qui a trait au développement des problèmes intériorisés et extériorisés. À 1 et 4 ans, 55 dyades mère-enfant ont participé à deux visites à domicile. À 1 an, la sensibilité maternelle a été évaluée et les mères ont complété l’agenda du sommeil de l’enfant. À 4 ans, les mères ont rempli le Child Behavior Checklist pour évaluer les symptômes intériorisés et extériorisés chez leur enfant. Les résultats ont montré que la sensibilité maternelle interagit avec la durée du sommeil de l’enfant. Ainsi, les résultats ont indiqué une relation négative entre la sensibilité maternelle et les problèmes intériorisés et extériorisés, mais seulement chez les enfants qui dorment plus la nuit. Les résultats présentés dans les deux articles ont été discutés, ainsi que leurs implications théoriques et cliniques.Since sleep and internalizing and externalizing problems in childhood are associated with several aspects of social, emotional and cognitive development, it appears essential to study these two indicators of self-regulation in children and to understand the factors that contribute to their emergence. The overall objective of the thesis was to better understand the factors associated with the development of psychophysiological self-regulation, as measured by the quality of child sleep, as well as emotional and behavioural self-regulation, as indicated by the presence of internalizing and externalizing symptoms in children. The first article aimed to examine the prospective and longitudinal links between the quality of mother-child and father-child interactions and preschoolers’ sleep. Three dimensions of maternal interactive behavior were considered with 70 mother-child dyads, while the quality of father-child interactions was assessed among 41 of these families. At 12 months, maternal mind-mindedness and maternal sensitivity were rated. Maternal autonomy support was assessed at 15 months and the quality of father-child interactions was scored at 18 months. Children’s sleep was assessed at 3 and 4 years using a sleep diary completed by mothers during three consecutive days. Results indicated that after controlling for family SES and daycare attendance, the quality of both mother-infant and father-infant interactions was related to children’s proportions of night-time sleep at preschool age. The second article aimed to examine infant sleep as a moderator of the relation between maternal sensitivity and child externalizing and internalizing symptoms, in a prospective longitudinal design. 55 infants took part in two assessments, at 1 and 4 years. Maternal sensitivity was rated at 1 year, based on observations performed throughout a home visit. Infant sleep was assessed at 1 year as well, using a sleep diary completed by mothers. At 4 years, mothers completed the Child Behavior Checklist to assess children’s internalizing and externalizing symptoms. Results indicated that maternal sensitivity interacted with infant sleep duration, such that there were negative relations between sensitivity and subsequent internalizing and externalizing symptoms only for children who slept more at night. The results presented in both articles are discussed along with their theoretical and clinical implications.
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Castiglioni, Nicole Ayse. "Expectations of self, others, and control : a model of associations among adult attachment orientations, self concealment, externality, anxiety sensitivity, and perceived social support /." 2009. http://149.152.10.1/record=b3071693~S16.
Повний текст джерелаАнотація:
Thesis (M.A.) -- Central Connecticut State University, 2009.Thesis advisor: Rebecca Wood. "... in partial fulfillment of the requirements for the degree of Master of Arts in General Psychology." Includes bibliographical references (leaves 34-40). Abstract available via the World Wide Web.