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Dissertations / Theses on the topic 'Behavioural brain research'
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1
Purves, David G. "The role of the striatum in aspects of cognitive activity." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259916.
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Hölscher, Christian. "Behavioural and pharmacological studies of memory formation in the domestic chick, Gallus domesticus." Thesis, Open University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385848.
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Spanswick, Simon, and University of Lethbridge Faculty of Arts and Science. "A behavioural analysis of visual pattern separation ability by rats : effects of damage to the hippocampus." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2005, 2005. http://hdl.handle.net/10133/236.
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Different events usually contain similar elements that can contribute to interference during memory encoding and retrieval. The hippocampus (HPC), a structure that is critically involved in some forms of memory, has been hypothesized to reduce interference between memories with overlapping content, thus facilitating correct recall. Pattern separation is one hypothetical process whereby input ambiguity is reduced. Here we test the hypothesis that the HPC and/or dentate gyrus (DG) are important for pattern separation by measuring performance by rats with damage in tasks that require discrimination between visual stimuli that share systematically varying numbers of common elements. Rats with HPC damage were slower to resolve discriminations with minimal degrees of overlap. Lesions of the DG did not affect the ability of rats to deal with overlap, suggesting a dissociation between the HPC and DG. Our results provide partial support for the idea that the HPC contributes to the pattern separation process.ix, 84 leaves : ill. ; 29 cm.
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Young, Katherine S. "Adults' responses to infant vocalisations : a neurobehavioural investigation." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:6f91f1ae-0948-4b34-b45f-ee65ae421934.
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Infant vocalisations are uniquely salient sounds in the environment. They universally attract attention and compel the listener to respond with speed and care. They provide a wealth of information to parents about their infant’s needs and affective state. There is a scientific consensus that early parenting has a profound impact on child development. In particular, the sensitivity with which parents respond to their infant’s communicative cues has been shown to affect cognitive and socio-emotional outcomes. The mechanisms underlying such sensitivity are not well understood. In this thesis, adults’ sensitivity to infant cues will be considered in terms of two components, the ‘promptness’ and ‘appropriateness’ of responses, as originally conceptualised by Bell and Ainsworth (1972). Promptness of responses is considered in terms of adults’ ability to move with speed and effort after listening to infant vocalisations. Appropriateness, on the other hand, is considered in terms of adults’ ability to differentiate between functionally significant parameters in infant vocalisations. The effect of modifiable environmental factors on the promptness and appropriateness of responses is also investigated. Finally, a focused investigation of the brain basis of responses to infant vocalisations is presented. Overall, findings demonstrated that infant vocalisations undergo privileged, specialised processing in the adult brain. After hearing an infant cry, adults with and without depression were found to move with greater coordination and effort. Adults were also found to be attuned to subtle parameters in infant cries. This sensitivity was shown to be affected by two participant-level factors, depression and previous musical training. Furthermore, this sensitivity could be enhanced through intervention, as evidenced by findings from short-term, perceptual discrimination training. The notion of privileged processing of infant vocalisations is further supported by evidence of early discrimination of infant sounds in a survival-related subcortical brain structure. Future directions for this work include directly relating current experimental measures of adults’ responses to infant cues with parental sensitivity to infant communication during dynamic interactions. Translating current findings into applied settings would require an investigation of the effects of factors such as musical and perceptual training on sensitivity to infant cues in at-risk populations, such as mothers and fathers with depression. Lastly, an increased understanding of the brain basis of adults’ sensitivity to infant cues will provide insight into our greatest challenge: parenting our young.
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Rifshana, Fathimath. "Outcome evaluation of the Massey University Concussion Clinic: a pilot study : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Psychology at Massey University, Palmerston North, New Zealand." Massey University, 2009. http://hdl.handle.net/10179/1165.
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The primary aim of the present study was to evaluate the effectiveness of the intervention provided by Massey University Concussion Clinic for individuals following Mild Traumatic Brain Injury (MTBI). Concussion Clinics were set up across New Zealand to provide early intervention and assessment for individuals with MTBI to prevent long term complaints. Treatment outcomes at these clinics have not been empirically examined before. The current study compared the levels of post concussion symptoms, anxiety, depression, and psychosocial functioning between an intervention and a control group using a quasi-experimental design. In addition, reasons for nonattendance to the clinic, and participants’ perceptions of their recovery were also explored. The main outcome measures used were the Rivermead Postconcussion Symptoms Questionnaire, the Hospital Anxiety and Depression Scale, and the Sydney Psychosocial Reintegration Scale-2. Outcomes were initially assessed soon after injury or referral to the clinic and then three months later. Participants were recruited from the Palmerston North Hospital Emergency Department and the Massey University Concussion Clinic. With 20 participants in the intervention group and 15 in the control group, the main results showed that the Concussion Clinic intervention significantly decreased the level of anxiety and depression reported by participants in the intervention group over the control group. Greater improvements in post concussion symptoms and psychosocial functioning were also indicated in the intervention group. Additional findings suggest difficulty with transportation as a reason for nonattendance, which could be a potential barrier to recovery. Furthermore, participants highlighted the benefits of attending the service and its role in their recovery. Important issues relating to the referral processes were also identified. Findings of the current study suggest that the Concussion Clinic intervention is effective in improving recovery for those accessing the service. Nevertheless, these results must be interpreted with caution due to the small sample size. Further research is warranted to examine the effectiveness of the Concussion Clinics with larger samples, and the current study may serve as a valuable pilot for these future investigations.
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McGregor, Alison. "The contribution of the amygdaloid complex to the socio-sexual behaviour of the male rat." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385709.
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Tziortzi, Andri. "Quantitative dopamine imaging in humans using magnetic resonance and positron emission tomography." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:26b8b4c2-0237-4c40-8c84-9ae818a0dabf.
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Dopamine is an important neurotransmitter that is involved in several human functions such as reward, cognition, emotions and movement. Abnormalities of the neurotransmitter itself, or the dopamine receptors through which it exerts its actions, contribute to a wide range of psychiatric and neurological disorders such as Parkinson’s disease and schizophrenia. Thus far, despite the great interest and extensive research, the exact role of dopamine and the causalities of dopamine related disorders are not fully understood. Here we have developed multimodal imaging methods, to investigate the release of dopamine and the distribution of the dopamine D2-like receptor family in-vivo in healthy humans. We use the [11C]PHNO PET ligand, which enables exploration of dopamine-related parameters in striatal regions, and for the first time in extrastriatal regions, that are known to be associated with distinctive functions and disorders. Our methods involve robust approaches for the manual and automated delineation of these brain regions, in terms of structural and functional organisation, using information from structural and diffusion MRI images. These data have been combined with [11C]PHNO PET data for quantitative dopamine imaging. Our investigation has revealed the distribution and the relative density of the D3R and D2R sites of the dopamine D2-like receptor family, in healthy humans. In addition, we have demonstrated that the release of dopamine has a functional rather than a structural specificity and that the relative densities of the D3R and D2R sites do not drive this specificity. We have also shown that the dopamine D3R receptor is primarily distributed in regions that have a central role in reward and addiction. A finding that supports theories that assigns a primarily limbic role to the D3R.
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Hines, Dustin J., and University of Lethbridge Faculty of Arts and Science. "The role of cues and the hippocampus in home base behaviour." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2004, 2004. http://hdl.handle.net/10133/646.
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The thesis examines the ability of animals to construct a home base. The home
base is a point in space where animals rear, groom, and circle and is a primary element in
organized spatial behaviour (Eilam and Golani 1989). Once animals establish a home
base, they make outward trips and stops, and after a series of trips and stops they return
again to the home base. The home base behaviour of animals acts as a platform for asking
questions about the cognitive organization of an environment. The thesis describes five
main findings. Control and hippocampectomized animals use (1) proximal and (2) distal
cues to form a home base and organize their behaviour. (3) Control and olfactory
bulbectomized animals form home bases in the dark where as hippocampectomized
animals are impaired suggesting self-movement but not olfactory cues play a role in
home base behaviour. A final set of experiments demonstrated that control and
hippocampectomized animals learn the position of (4) proximal and (5) distal cues so that
in the cue's absence, animals still form a home base at that position. The demonstration
that a central feature of exploratory behaviour, establishing a home base, is preserved in
hippocampectomized rats in relation to proximal, distal, and conditioned visual cues -
reveals that exploratory behaviour remains organized after hippocampal lesions. The
inability of hippocampectomized rats to form a virtual home base in the absence of visual
cues is discussed in relation to the idea that the hippocampus contributes to inertial
behaviour that may be dependent upon self-movement cues.xv, 232 leaves : ill. ; 29 cm.
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Kumlehn, Malte. "Consumer Neuroscience : Pricing research to gain and sustain a cutting edge competitive advantage by improving customer value and profitability." Thesis, Umeå universitet, Handelshögskolan vid Umeå universitet, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-44981.
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This is the first study that exclusively focuses on gaining knowledge of the vast opportunities that Neuroscientific pricing research offers for marketing purposes. The findings of this study provide evidence of the importance to improve customer and organizational decision making. The findings further highlight the crucial importance of Neuroscientific pricing research. Moreover, evidence is provided that fundamental and well formulated models and concepts need to be developed in the discipline of Neuroscientific pricing research. Neuroscientific pricing research can improve the understanding and the use of pricing by validating and developing existing pricing theories that are largely behavioural or standard economic in nature and build on unrealistic assumptions such as perfect information, profit maximization and rational choices. (Pratt, 1964; Lucas, 1971; Friedman, 1976; Stigler, 1987; Rappaport, 1996; Caplin & Dean, 2009, p. 24) Rao and Kartono (2009, p. 9) explain that "our understanding of pricing processes is still in its infancy". Moreover, Neuroscientific pricing research has been sporadically published. (Knutson, Fong, Adams, Varner, & Hommer, 2001; Knutson, Rick, Wimmer, Prelec, & Loewenstein, 2007; Plassmann, O'Doherty, Shiv, & Rangel, 2008) So far, pricing research has incorporated advancements in game theory and microeconomics, behavioural decision theory, psychological and social dimensions and newer market mechanisms of auctions over the last decades. (Rao, 2009, p. 1) Bijmolt et al. (2005) highlights that pricing research has implications for how we understand information processing in any decision context where resources and information are scarce and costs must be weighed against benefits. Moreover, Neuroscientific pricing- branding- and design research will offer organizations a unique range of tools and abundant opportunities to gain and sustain a competitive advantage and to improve customer value and profitability. Innovative industry leading companies, governments and civil society organizations should debate whether they can afford to not to be part of developing Neuroscientific research mainly for the reasons of control and power.
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Nyh, Johan. "From Snow White to Frozen : An evaluation of popular gender representation indicators applied to Disney’s princess films." Thesis, Karlstads universitet, Institutionen för geografi, medier och kommunikation, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36877.
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Simple content analysis methods, such as the Bechdel test and measuring percentage of female talk time or characters, have seen a surge of attention from mainstream media and in social media the last couple of years. Underlying assumptions are generally shared with the gender role socialization model and consequently, an importance is stated, due to a high degree to which impressions from media shape in particular young children’s identification processes. For young girls, the Disney Princesses franchise (with Frozen included) stands out as the number one player commercially as well as in customer awareness. The vertical lineup of Disney princesses spans from the passive and domestic working Snow White in 1937 to independent and super-power wielding princess Elsa in 2013, which makes the line of films an optimal test subject in evaluating above-mentioned simple content analysis methods. As a control, a meta-study has been conducted on previous academic studies on the same range of films. The sampled research, within fields spanning from qualitative content analysis and semiotics to coded content analysis, all come to the same conclusions regarding the general changes over time in representations of female characters. The objective of this thesis is to answer whether or not there is a correlation between these changes and those indicated by the simple content analysis methods, i.e. whether or not the simple popular methods are in general coherence with the more intricate academic methods.Betyg VG (skala IG-VG)
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Faleafa, Monique. "Traumatic brain injury rehabilitation outcomes across cultures." 2004. http://hdl.handle.net/2292/1890.
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Whole document restricted, see Access Instructions file below for details of how to access the print copy.This exploratory study investigates Traumatic Brain Injury (TBI) rehabilitation processes and outcomes among culturally diverse outpatients in community-based rehabilitation who have sustained a Mild to Moderate TBI. The major aims of this study are twofold: firstly, to determine whether community-based rehabilitation outcomes following TBI differ across Mäori, Pacific and Pakeha cultures; and secondly, to determine and identify any service delivery needs for Mäori and Pacific people in TBI rehabilitation that may be distinct from Pakeha. A fixed comparative non-experimental design was utilised where participants were selected using direct control based on their self-identified ethnic group resulting in sub-samples of 11 Mäori, l1 Pacific and 11 Pakeha (n=33). A "Close Other" from their care-giving support network was selected by the participant to take part in the study (n=20). Each participant completed the Neurobehavioural Cognitive Status Examination (Cognistat), the Brain Injury Community Rehabilitation Outcome Scales (BICRO Scales), the Client Satisfaction Questionnaire (CSQ-31), the Beck Depression Inventory, 2nd Edition (BDI-II), the Impact of Events Scale Revised (IES-R) and a semi-structured qualitative interview, while a "Close Other" completed a BICRO "Carer" questionnaire. Results indicate that all participants were at a homogenous level of overall cognitive functioning but Pacific peoples scored significantly lower than both Mäori and Pakeha on two Language subtests and significantly lower than Pakeha on the Memory subtest. Statistical analysis suggests that both Years of Formal Education and English as a Second Language are important factors contributing to these differences. Individual handicap increased following TBI and decreased following rehabilitation, with no significant difference across cultures and suggesting efficacy of rehabilitation. Of the total sample, 42% scored in the clinically depressed range (half of whom were Pakeha) and 24% of the sample showed mild signs of post-traumatic stress (of whom almost 90% were Mäori or Pacific). Although 97% of participants were generally satisfied with their overall rehabilitation service, Mäori and Pacific people were significantly less satisfied with their Physical Surroundings and the Quantity of Services they received. In conclusion, there appears to be universalities in TBI experience and global rehabilitation outcomes that transcends individual cultures. However, there are micro-level cultural variations that have valuable implications when planning culturally appropriate rehabilitation services for the future. For Mäori and Pacific People, acculturation levels will determine the extent to which these implications apply.
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Lewis, Mark. "Development of systematic behavioural observation to quantify ongoing cognitive activity limitations after brain injury : a dissertation presented in partial fulfilment of the requirements for the degree of Doctor of Psychology at Massey University, Wellington, New Zealand." 2010. http://hdl.handle.net/10179/1686.
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One of the goals of cognitive rehabilitation following traumatic brain injury is to help people perform everyday tasks. However, options for the rigorous assessment of everyday cognitive effectiveness after rehabilitation are limited. Performance on neuropsychological tests is only moderately correlated with everyday functioning, while previous measures of everyday functioning include only fairly general estimates of overall cognitive functioning. The aim of the current study was to develop an ecologically valid measure that captured a number of subdomains of executive functioning, using systematic behavioural observation of an everyday task. The initial phase of the research involved identifying an everyday task that was sufficiently complex to ensure that executive functioning was utilised in the completion of the task. Participants with traumatic brain injury were then asked to prepare chocolate brownies, using a recipe provided, and a hot drink. Participants were allowed to use any compensatory strategy to help complete the task. Participant performance was directly observed by an examiner and videotaped for subsequent inter-rater reliability. Two independent raters assessed nine components of executive functioning. During this phase, the examiner manuals were modified improving inter-rater reliability. The final version of the measure was then trialled with participants with and without traumatic brain injury. Final inter-rater reliability indicated the approach had merit. Significant and moderate correlations were found between traditional measures of executive functioning and the everyday task. This study employed systematic behavioural observation to obtain fine-grained information regarding a person’s cognitive functioning. With further development, this approach may prove useful for targeting and monitoring specific functional difficulties during cognitive rehabilitation.
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Christianson, Muriel Katherine. "Efficacy of cognitive behavioural therapy for clients who have sustained a traumatic brain injury (TBI) : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy (PhD) in Psychology at Massey University, Wellington, New Zealand." 2009. http://hdl.handle.net/10179/1044.
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While the focus of rehabilitation following traumatic brain injury (TBI) is often on management of physical and cognitive impairments, emotional and behavioural changes in the person with the injury may represent major hurdles in adjustment following injury. Mood, anxiety and adjustment disorders are common following TBI. A manualised cognitive behavioural therapy (CBT) treatment programme was developed that incorporated provision of education on consequences of TBI, used cognitive and behavioural strategies to recognise and manage emotional reactions to injury, and promoted achievement of personal goals. Participants were nine people with TBI referred to Massey University Psychology Clinic Wellington, for psychotherapy to assist in managing symptoms of psychological distress or adjustment difficulties following injury. Measures used included the Hospital Anxiety and Depression Scale (HADS) to monitor progress in reduction of symptoms of Anxiety and Depression; the Patient Competency Rating Scale (PCRS) to assess competency across areas of day-to-day living; and the Homework Rating Scale Second Edition (HRS-II) to assess the value of homework assignments for participants. Results were presented graphically in group format and in the form of individual case studies outlining progress in achieving individual goals. There was considerable variation in the responses of participants to treatment. When anxiety and depression were secondary to other referral issues such as fatigue and pain that remained high over treatment sessions, there was limited movement on HADS Anxiety and Depression scores. The small number of participants impacted on the ability to detect differences between Patient and Informant ratings on the PCRS or to demonstrate increased levels of awareness over treatment sessions. Consistent completion of Homework assignments proved difficult for participants. Factors that impacted on achievement of personal goals included ongoing levels of fatigue and pain, levels of personal expectation, interpersonal and organisational skills, insight into emotional reactions, and good family and social support. There is a part for a CBT approach in adjusting to changes following TBI, particularly in assisting with reassessing expectations following injury.
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Coetzer, Estelle Lydia. "An investigation into whether learning about social cognitive neuroscience in a leader development intervention helps to facilitate behavioural change in leaders." Thesis, 2019. http://hdl.handle.net/10500/25765.
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Text in EnglishThe field of neuroscience is increasingly gaining exposure in the leadership domain, where it is now beginning to contribute to research and development. In this study an exploratory investigation of leadership development was undertaken with four primary aims. Firstly, to find out whether exposing participants in managerial positions to cognitive neuroscience knowledge contributes to their development as leaders. Secondly, to explore and illuminate the underlying processes that support such behavioural change. Thirdly, to investigate how behaviour changes in leaders exposed to social cognitive neuroscience knowledge are manifested within an organisational setting. Fourthly, to determine what the perceived impact on the leaders and others are regarding such behaviour changes in a specific organisational context, namely a retail environment. In the study, leaders were exposed to a social cognitive neuroscience workshop over a 5-month period. They were provided with foundational knowledge of social cognitive neuroscience in workshops with two objectives. Firstly, the workshops were intended to enhance their understanding of the brain and cognitive systems underlying thinking and behaviour of the self and others. Secondly, in the workshops the complex interaction between brain systems and subsystems such as the executive and emotional systems were shown to mirror, in a metaphorical way, some of the complex interactions between structures in business organisations. Semi-structured interviews were conducted with a purposive sample of 16 participants, as well as with some their line managers and direct reports. Data were qualitatively analysed by means of content analysis. Findings support the view that gaining social cognitive neuroscience knowledge led to increased self-awareness and an understanding of others. Implicit behavioural change resulted from cognitive and affective changes. Explicit behaviour changes were the result of conscious choice and were supported by both personal and organisational motivational drives. Leaders made behaviour changes at both personal and interactive levels based on their understanding of social cognitive neuroscience. Behaviour changes related to increased emotional regulation, a change in leadership style, an inclusive communication style, cultivating relationships, recognition strategies and strengthening trust. The implemented behaviour changes had a positive impact on participants and their direct reports and related mostly to positive affective changes, growth and development, improved relationships, personal effectiveness and team dynamics.
Psychology
D. Phil. (Consulting Psychology)
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Tschudin, Alain Jean-Paul Charles. "Relative neocortex size and its correlates in dolphins : comparisons with humans and implications for mental evolution." Thesis, 1998. http://hdl.handle.net/10413/6336.
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The superior neocortex ratios in primates and their distinctive relationship with sociality among terrestrial mammals are well documented. However, there has been an absence of research into relative neocortex size, its evolution and correlates in marine mammals, such as cetaceans (dolphins,
porpoises and whales). This study uses the advanced radiological techniques of computed tomography and magnetic resonance imaging to establish neocortex ratios in dolphins and to re-assess these values for humans. It was found that freezing and defrosting did not significantly alter the neocortex ratios of dolphins and thus extra material as included in the analysis. Furthermore, equations for the estimation of neocortex ratios from eT and MRI have been applied to the cranial volumes calculated for 19 toothed whale species, in order to extend the range of analysis. Using these techniques, it appears that dolphin neocortex ratios are
higher than those of other mammals, except for primates. A notable finding is that dolphin values lie between human and other primates and are closer to human ratios at 4.1, than to non-human ratios reaching 3.2~ (Dunbar, 1992). The highest delphinid neocortex ratio from MRI was 3.94 for common dolphins, while the highest estimated neocortex ratio was at 3.95 for killer whales. To establish the correlates of such high neocortex ratios in dolphins, their scores were related to variables representing foraging ecology, sound and sociality. Although delphinid neocortex ratios do not appear to be related to foraging variables, they are significantly related with sound and sociality variables. Of these relationships, the most substantial finding exists with respect to the relationship of delphinid neocortex ratios and their mean group size. The capacity to predict group size from relative neocortex size has not been noted in non-primate species, and has formed the basis for current theories of social intelligence and mental evolution. The findings of this study are therefore of considerable interest and may have substantial implications. These may impact on current theories of primate-human mental evolution and therefore it is strongly recommended that the mental capacities of other
mammals, such as dolphins, be examined in greater detail to support or
refute these claims.Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1998.