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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
751

Putting 'Humpty' together again : a testifying of the embodied nature of human experiencing : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Psychology at Massey University, Palmerston North, New Zealand

Tuck, Brian William January 2009 (has links)
The complex functioning of the human body produces the biological, historical and environmental contingencies of lived existence. These experiences of embodiment are chiasmic, dialectical and dialogical, and underpin the narrative dilemmas we create through the storied nature of our attempts to make sense of them. In testifying my own embodiment this autobiographical form of sensual scholarship emphasizes the subjective basis for my body’s psychology. By developing the complicating action segments of my life story told through interview data into a chronologically-ordered and textually- layered account of personally significant memories, I craft a story of my panicking body. My upbringing was influenced by discourses that reinforced parental and family affiliation at the expense of my feeling body. Unravelling my need to exercise as a contingency of this affiliation provides retrospective meaning to the distress my panicking caused. Situating my feelings, thoughts, emotions and actions within the broader constraints of my family’s history, community, religion and culture reveals the contingent nature of my embodiment. Describing the shifting contingencies of a life lived since my upbringing in the small, rural town of Inglewood, New Zealand, provides the opportunity to recognize and to re-align the dialectics of identity that help to make up my body’s psychology. Juxtaposing this narrative meaning-making are my revelations of experiential integration achieved through the flow of exercise. Understood as an extension of my body’s fundamental sensuality, this evolutionally-refined capacity for engagement underpins my lived experiencing. Together these sentient and reflexive forms of testimony confirm the inherence of my sensuality and the circumstance of self-hood, and invite you, the reader, to explore the workings of your own body. By revealing the sensual and symbolic strands of my embodiment this story of human contingency reveals something of the fleshy consciousness that we all share, not by speaking for anyone else, but by calling attention to the taken-for-granted nature of its unfolding. By arguing for a psychology more relevant to lived experiencing, my thesis questions the body of Western science and, in particular, psychology’s version of it. Articulating the felt nature of my experiencing situates my mind back in my body and, in doing so, fleshes out its psychology. While the insights shared here are personal, the relevance of the felt-body is found in the ways it becomes discoursed and narrated.
752

"The map, the navigator, and the explorer": evaluating the content and quality of CBT case conceptualization and the role of self-practice/self-reflection as a training intervention : a thesis presented in partial fulfillment of the requirements of the Doctor of Philosophy in Psychology at Massey University, Albany, New Zealand

Haarhoff, Beverly Ann January 2008 (has links)
Cognitive Behaviour Therapy (CBT) leads the way as an evidenced based psychotherapy, and the evaluation of CBT training programs is increasingly seen as important if this position is to be maintained. In this dissertation, CBT case conceptualization, as a core psychotherapeutic competency, acquired in training, is evaluated. Case conceptualization, integrates precipitating, predisposing, maintaining, and protective factors, functioning as an explanatory and prescriptive roadmap for therapy. Gaining self-knowledge through exposure to some form of personal therapy is cited as important in gaining psychotherapeutic competency. Self-practice/ self-reflection, show promise as a form of personal therapy compatible with the principles of CBT. This study evaluates the content and quality of CBT case conceptualizations produced by a sample of 26 participants who have completed the Massey University Post Graduate Diploma, using three case conceptualization rating scales. In addition, the impact of a self-practice/self-reflection manualised training intervention designed to improve the quality of case conceptualization in trainee cognitive behaviour therapists, is explored using thematic analysis. The evaluation of the CBT conceptualizations showed predisposing factors and psychological mechanisms as receiving the most attention from participants. However, the majority of participants failed to pay attention to socio-cultural, biological, protective factors and factors pertaining to the therapeutic relationship. The majority of the participants were able to produce a 'good enough' CBT case conceptualization, however the ‘problem list’ was not well developed, and the conceptually relevant aspects of the therapeutic relationship and protective factors were given less attention. The effect of a self-practice/self-reflection training intervention on the quality of CBT case conceptualizations produced by the intervention group (n = 16) drawn from the main participant sample, was qualitatively evaluated using thematic analysis. Theoretical understanding of the model, self awareness, empathy, conceptualization of the therapeutic relationship, adaptation of clinical interventions, and clinical practice were all subjectively perceived by participants to have increased as a result of the intervention. An inferential analysis compared the performance of the intervention group (n=16) that of a comparison group (n=10), made up of the remainder of the larger sample described in the context of the first question. The comparison group had not been exposed to the manualised intervention. The comparison was both within, and between the two groups. The quality of the intervention group showed an improvement on one of the rating scales, indicating a possible link between the training intervention and case conceptualization competency, however, the improvement was not replicated by the other two rating scales. The findings are discussed in the context of improving CBT training with regard to case conceptualization.
753

New Zealand counsellors talk about ritual abuse: A discourse analysis

Pack, Sylvia January 2009 (has links)
Research indicates that in the last five decades, claims of Satanic ritual abuse (RA), and the numbers of clients receiving counselling for RA, have increased in all Western countries. This has resulted in an increased corpus of related literature overseas, which includes studies in which facticity as well as aetiology, symptomology and treatment are debated. This present study focuses on a New Zealand context, and examines the talk of New Zealand counsellors in relation to their views regarding RA and the counselling of RA clients. Social constructionist and positivist epistemologies were evaluated in terms of their suitability for this research, and the discourse analytic method developed by Potter and Wetherell (1987) chosen as the means by which participants’ talk might be analysed in such a way as to allow the inclusion of multiple constructions and the emergence of the many discourses and conflicting ideas which occur in overseas literature. A broad selection of the literature was first critically analysed to give an understanding of the topic. Nine counsellors gave interviews, eight women and one man, all Pakeha, six of whom were ACC-registered (Accident Compensation Commission, 2009). The participants constructed RA as a physical reality, which was justified by the use of the credible client discourse. A traditional linguistic repertoire furnished a discourse of government backing, which was employed to warrant voice. A moral stake in counselling, named concern for the client, was shown to be present in all arguments. The participants constructed three truths relative to context: a legal truth, the counsellor’s truth, and the client’s truth. Recovered memories were given a dual construction which legitimised correct and incorrect recall. DSM-IV (American Psychiatric Association, 2000) labelling was debated in a discourse of ambivalence. Finally in a discourse of preparedness, the participants constructed the therapeutic skills needed to treat RA clients. The thesis concludes by highlighting the participants’ comments regarding the need for openness and awareness, and specialised literature and training for counsellors treating RA clients.
754

Motivation and well-being in humanitarian health workers: relating self-determination theory to hedonic vs eudaimonic well-being, vitality and burnout : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Psychology, Massey University, Palmerston North, New Zealand

Tassell, Natasha Ann January 2009 (has links)
This research examined the effects of motivation on the well-being of humanitarian health workers. Using Self-Determination Theory, I argued introjected and identified motivations were applicable to this occupational domain, and have differential effects on well-being. Introjected motivation would be positively related to hedonic well-being and burnout, while identified motivation would be positively related to eudaimonic well-being and vitality. Orientations to happiness and passion were proposed as mediating these relationships. An online quantitative questionnaire was used in the first phase of data collection. Respondents were N = 82 humanitarian health workers. A semi-structured interview methodology was used in the second phase. Participants were N = 5 humanitarian health workers. Path analyses revealed neither introjected nor identified motivation was significantly related to vitality or hedonic vs. eudaimonic well-being. Both motivations had significant direct effects on burnout, albeit in the opposite direction to hypotheses. Passion moderated the relationship between motivation and burnout. Additional path analyses showed obsessive passion mediated the path between introjected motivation and emotional exhaustion. Harmonious passion mediated the path between identified motivation and diminished personal accomplishment. Both obsessive and harmonious passion mediated the paths between each motivation and depersonalisation, although identified motivation had the strongest relationship with this aspect of burnout. Interview data supported the majority of quantitative findings. The results suggest the motivations underlying engagement in humanitarian work, are related to the development of burnout. The mediational effect of passion determines which aspect of burnout will be most prevalent. The findings have applicability to the design and implementation of recruitment strategies, and programs aimed at the treatment and prevention of burnout in workers, both pre- and post-deployment to humanitarian situations.
755

The effectiveness of a brief psychoeducational intervention for people with schizophrenia and their families : a dissertation presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Psychology at Massey University, Palmerston North, New Zealand

Moxon, Alicia M. January 2009 (has links)
In an attempt to replicate and extend previous research, the present study conducted a brief psychoeducational intervention through community organisations designed to overcome methodological shortcomings of past studies. The two session intervention (one session with follow-up phone call) sought to establish if a brief community intervention was effective in both improving family members’ knowledge about schizophrenia and various other indicators linked to improved client functioning. People with schizophrenia and their family members (N = 50) were recruited into a controlled trial of a brief educational intervention. Clients and their corresponding key family members were randomly allocated to a treatment group or a wait-list control group. Measures included those reflecting knowledge about schizophrenia, expressed emotion, perceived coping ability, burden of care and distress. Analyses showed that knowledge increased significantly after the intervention and not after the control condition and was maintained at a nine-month follow-up. Family members’ and clients’ expressed emotion ratings significantly decreased from pre- to post-test with changes in total expressed emotion scores improving across treatment by over twice the magnitude compared to the control condition. All gains were maintained at the nine-month follow-up, with continuing improvement seen in family members’ intrusiveness ratings. A similar pattern of findings was reflected on other indices, with significant improvements in burden of care, coping and distress that were more a function of intervention than the control condition. All gains were maintained at the nine-month follow-up. Additionally, assessment of relapse rates at this follow-up interval indicated that no client had relapsed. Overall the results suggested that although knowledge increased as a result of education, the improvements in all indicators other than knowledge appeared to be due to education combined with some non-specific factors. These non-specific factors may have included expectancy effects, setting effects, sampling bias and other possibilities. These issues are considered in terms of implementation of brief programs in supportive community settings and in terms of future research.
756

"Diabetes? I can live with it" : a qualitative evaluation of a diabetes self-management programme : a thesis presented in partial fulfilment of the requirements for the degree of Master of Arts in Psychology at Massey University, Palmerston North, New Zealand

Andrae, Daniela January 2009 (has links)
Self-management programmes provide one form of education for people with diabetes. Evaluations of these programmes allow for a better understanding in regard to their impact and whether outcomes are met. Very little research has used qualitative methods to capture participants’ experiences of these programmes and their perception of psychological outcomes. This is the first qualitative evaluation of the Type 2 Diabetes Self-Management Programme in Whangarei. It has adopted an interpretative-phenomenological approach to explore participants’ experiences of the programme and participants’ perceptions in regard to their self-efficacy and quality of life after attending a course. A sample of 7 participants with diabetes provided data via interviews 4 weeks and 3 months after attending the course. The themes that emerged from the initial interview were separated into three evaluation components. In “6 weeks sounded very long but it was worth the time”, participants discussed enrolment, benefits of the course and suggestions for future participants. In “I know what I need to do and I’m confident to do it”, participants linked the gained knowledge from the course to improvements in their self-efficacy regarding self-management behaviours, education and control of own life. In “Life is good, diabetes is just another thing to handle”, participants reflected on the impact of living with diabetes and changes to their life. An overarching theme of settling into a comfortable routine emerged from the follow-up interview. Participants reflected positively on their course and research participation. The programme was perceived to be beneficial to participants, impacting positively on increasing knowledge, self-efficacy development, behaviour changes and quality of life. The participants maintained these benefits in the short-term. These results are discussed in terms of the need for further research to evaluate if benefits are maintained in the long-term, referral process to the programme, decision-making process in regard to enrolment and impact of a support person attending the programme. Practice implications for the programme are discussed in regard to incorporating a follow-up phone call to participants after they attended a course and offering follow-up sessions with the latest information on diabetes care.
757

Balanced parenting with young children : relationship focused parent training within a dialectical framework : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Clinical Psychology at Massey University, Wellington, New Zealand

Couch, Clare Mary January 2009 (has links)
While traditional behavioural parent training programmes have assisted families with concerns of child behaviour problems, they have not kept abreast with recent conceptualisations of the development of problematic behaviours in the parent-child relationship. Research has indicated that understanding of this relationship needs to go beyond bidirectional explanations and that a dialectical framework better describes the complexity of this relationship, which, in turn, should be reflected in the parent training programmes offered. Therefore, this study provided a parent training programme focused on balance in the parent-child relationship, which encapsulated the complex, dialectical nature of this intimate relationship. A central implication when adopting this notion of balance was that all aspects of the programme were addressed at the parent and child level. In addition, multiple factors were addressed that included mindfulness and acceptance, dealing with emotions, understanding development, and addressing parental attributions. It was only within this overarching concept of balance and relationship factors that behavioural skills were introduced. Mechanisms of change were identified by investigating parental emotional schemas through their narratives about themselves, their child, and the programme. This research involved 23 parents with their 3-4 year-old children in a parent training programme where both the parent and child met weekly with a therapist in group parent training. The groups involved 2-hourly sessions for 5 weeks, modelled on a “coffee morning” where parents met and discussed issues and the children played alongside in the same room. A research assistant was available to play with and tend to basic needs of the children. Measures at pre-, post-treatment, and at follow-up targeted child behaviour problems, how much of a problem these were for the parents, parents’ sense of competence, parental attributions, and what was useful for parents in the programme. Results indicated that at post-treatment parents were able to address and maintain balance in their parent-child relationship and this reflected multiple dimensions of a dialectical understanding that had not been evident prior to the intervention. There was an increased mindfulness of both parent and child’s needs with a strong emphasis on an increased understanding of the child as an individual in their own right. Parents reported an increased recognition of the importance of dealing with emotions, with improved skills to be able to do this, an increased understanding of accommodating development, and an appreciation of needing to address parental attributions. In addition, there was a decrease in parent-reported intensity of child behaviour problems and how problematic these were for the parents, which were corroborated with parental verbal reports of improved child behaviour. Mechanisms of change that were identified included changes in parental attributions, parents being able to share with other parents, accessing “expert” knowledge from the programme facilitator, and gaining parental strategies. Implications for practice were discussed with suggestions for behavioural parent training programmes. In conclusion, limitations of the research and directions for future research were indicated.
758

Behavioural Inhibition in Children with ADHD: Does Stimulant Medication Eliminate Potential Deficits?

Caroline Johnson Unknown Date (has links)
Attention-Deficit / Hyperactivity Disorder (ADHD) is characterized by higher than normal levels of inattention, hyperactivity and impulsivity. Behavioural inhibition is proposed to be a primary deficit in children with ADHD, and is included as a component of a number of models accounting for the core behavioural symptoms of ADHD. Children with ADHD often show deficits in their performance on behavioural inhibition tasks relative to typically developing children of the same age, although inconsistent findings have been observed. Stimulant medication is associated with reduction in the core symptoms of ADHD in the majority of children. The primary goal of this thesis was to examine the effects of stimulant medication on behavioural inhibition in children with ADHD. Furthermore, this thesis sought to determine whether children with ADHD who have, and have not taken stimulant medication differ from normally developing children in terms of behavioural inhibition. In order to achieve these aims, it was necessary to firstly determine which tasks provide the best measures of behavioural inhibition. While many tasks have been used to measure inhibitory control amongst children with ADHD, it was unclear from previous research which tasks measure the same constructs. Study 1 investigated relationships in task performance among seven measures of inhibitory control, including the Stop-Signal task, Go / No-go task, Sustained Attention to Response Task (SART; analogous the not-X Continuous Performance Task), Eriksen Flanker task, Stroop, Opposite Worlds task and Task-Switching task. Significant developmental changes in a variety of cognitive abilities occur across childhood and adolescence. To limit the possibility that developmental changes in task performance would be observed, the age range for children included in the study was restricted to seven to 10 years. Nevertheless, to interpret correlations among inhibition measures from the tasks, it was necessary to determine whether children showed comparable developmental trends in their performance across tasks. Study 1A investigated developmental changes in the performances of the seven tasks purported to measure inhibitory control in normally developing children aged seven to 10 years. The results of this study suggested that the tasks chosen were appropriate for use among this age group, and that there is little change in behavioural inhibition across the seven to 10 years age range. In Study 1B, inhibition measures from each of the tasks were included in an exploratory factor analysis to determine those tasks measuring the same constructs. The results of Study 1B suggested that the Stop-Signal, Go / No-go and SART tasks provided the best measures of the behavioural inhibition construct. Performance on the Eriksen Flanker task was also related to the performance on these tasks, but in a direction contrary to that predicted. The Stroop and Opposite Worlds tasks measured the same construct, which appeared to be interference control. Performance on the Task-Switching task was not related to the performance on any other task, suggesting that this task did not measure behavioural inhibition or interference control. Study 2 investigated the performance of children with ADHD on the three tasks shown to be the best measures of behavioural inhibition in Study 1B (i.e., the Stop-Signal task, Go / No-go task and Sustained Attention to Response task). Children with ADHD were aged from seven to 11 years, and were tested both when they had, and had not taken their regularly prescribed stimulant medication. The performance of children with ADHD on these tasks was compared to that of normally developing children matched in age. The results of Study 2 suggested that stimulant medication leads to significant improvement in behavioral inhibition amongst children with ADHD, such that children with ADHD do not differ from matched controls. However, this effect was not observed across all three tasks. Reasons for this, along with study limitations, and directions for future research are discussed.
759

Correlates of Episodic Memory Functioning in Older and Younger Adults

Maria Cabral Collerson Unknown Date (has links)
Abstract This study examined memory functioning from a female perspective, with the aim of determining factors that might impact performance and render the accuracy of memory measurement, particularly with advancing age, problematic. Factors investigated, among others, were the role of attention and/or engagement with the memory tasks administered, state affect (i.e., positive and negative arousal) at time of testing, subjective memory appraisal, particularly in the domain of perceived memory self-efficacy (MSE), and the use of hormone replacement therapy (HRT) by older post-menopausal women. Two experimental computer-based tests of episodic memory, Paired Associates (PA) and Serial Recall (SR), were administered to 181 female participants aged 18 to 86 years. The tasks were designed to emphasise components that make episodic memory especially difficult, and minimise the use of strategies that might assist recall. Thus, they varied the requirement for recall as opposed to recognition, the need to form an association between a pair of unrelated words, and the need to discriminate the most recent list from earlier list(s). Other measures used included a demographic survey administered to participants individually in an interview format, and a number of variables examined in this study derived from responses to items contained in this survey. The research battery also included psychometric measures of transient affective states, psychological well-being, alertness, in addition to measures of global cognitive status and metamemory (i.e., subjective memory appraisal). The overall aim was to examine a range of factors that might influence episodic memory performance in cognitively intact healthy women, and thus render the interpretation of age-related changes to memory functioning problematic. For analyses participants were assigned to three groups - young, middle-aged and older. There were 60 young adults aged 18 to 29 years, 60 middle-aged adults aged 49 to 60 years, and 61 older adults aged 61 to 86 years. Each participant was tested individually in a single session lasting approximately 3 ½ hours, with younger participants requiring less time to complete assessments. Order of test administration and instructions were standardised across the entire sample. Inferential statistics included correlation, t-test statistic, and analysis of variance (ANOVA) with Tukey post-hoc comparisons. Hierarchical multiple regression analyses were conducted to determine key correlates of memory performance outcomes. No significant differences between the cohorts were found in mean years of education. However, episodic memory recall differed significantly by age group. As expected, young adults recalled significantly more words in the memory tasks than their older counterparts, and middle-aged adults outperformed adults in the oldest cohort. Moreover, older adults’ performance deficits were more pronounced in the tasks requiring that they make an association between a pair of unrelated words. Across all cases, transient mood states were significantly related to memory scores; however, individuals in the oldest cohort were particularly vulnerable to mood fluctuations. This cohort experienced a significantly greater decline in positive affect and a significant greater increase in negative affect while undergoing memory testing, highlighting their greater vulnerability to stressors inherent in a memory testing situation. Although scores on the measure of attention were near ceiling, indicative of participants’ level of effort, motivation, and engagement with the memory tasks, the measure of attention discriminated between older and younger adults’ results, and was a key predictor of memory performance. Noteworthy is that attention scores significantly contributed to performance variability in younger and older adults but not in middle-aged adults. Across all cases, age, education, and attention were the key contributing factors to variability in memory scores. Although four lifestyle factors: (1) subjective sleep appraisal, (2) body mass index (BMI), (3) physical activity, and (4) caffeine intake were significantly associated with performance in the memory tasks, once the effects of these key variables were removed, lifestyle factor did not uniquely contribute to performance variability. Moreover, no association was found between hormone replacement therapy (HRT) and episodic memory performance across the broader sample. However, in a small subgroup of older women (n = 15, M age = 66 years), long-term users of this treatment, HRT had a significant effect on memory performance and was indicative of better recall on the memory tasks. The effect of subjective memory appraisal, MSE included, on objective performance outcomes was examined. The results showed that memory self-evaluations were not a significant contributing factor to episodic memory performance, confirming that memory self-appraisal is a poor predictor of actual memory performance, and thus does not pose a challenge to the measurement of age-related changes to memory abilities. Although there were commonalities, factors influencing memory performance differed by age cohort. For example, in young adults, positive mood, a perception of sleeping well, subjective health, and attention were significantly related to performance on the memory tasks. However, once the effect of attention was removed in the regression analysis, no other variable was predictive of episodic memory functioning in this cohort. In contrast, the single significant predictor of memory performance in middle-aged individuals was education, and neither attention, nor positive mood, or physical activity had a significant effect on this cohort’s performance. Similarly, having more years of formal education benefited older adults’ episodic memory functioning. However, high scores on global cognitive functioning and on the tasks measuring attention were equally important to episodic memory recall in this age group. In sum, the significant contribution of age to memory variability attested to the utility of the memory measures in detecting age-related changes to episodic memory functioning, which were independent of deficits in attention or level of education. Moreover, the effect of several factors (e.g., transient mood, lifestyle) on memory scores was explained by an effect on attention, and this has clear implication for the proper evaluation of long-term changes to memory functioning. Limitations of the study and suggestion for future research are discussed.
760

Affect and Performance: A Multilevel Analysis of Moderators and Mediators

Elisha Frederiks Unknown Date (has links)
This thesis examined the intra-individual relationship between state affect and task performance, with an emphasis on a) the moderating effects of trait affect and task difficulty; and b) the mediating effects of cognitive and affective regulation. Theory and empirical research from the emotion, motivation, and personality literatures was integrated to develop a multilevel model of states, traits, and situational factors as predictors of task performance. Data from five studies were analysed using single- and multi-level techniques to test the hypothesised model of relationships. The findings are reported within three manuscripts, which comprise the body of this thesis. Manuscript 1 presents validation evidence for the psychometric instruments used to measure the self-regulatory components of the model. Three studies (N = 758) were conducted to examine the nomological network of cognitive and affective regulation. In parallel, two new self-report scales were developed to operationalise these constructs within a repeated measures paradigm. The three studies demonstrated that the new cognitive and affective regulation scales were uniquely associated with other self-regulatory, personality, affective and achievement variables at the intra-individual and inter-individual levels. Study 1 provided evidence for the unidimensionality, internal consistency, and construct validity of each scale. Study 2 replicated and extended construct validity evidence using a different sample and performance domain. Study 3 established the utility of each scale for assessing intra-individual variability in cognitive and affective regulation, and their ability to predict performance within individuals. In sum, the three studies suggested that the new measures of cognitive and affective regulation were psychometrically adequate for use in model testing. Manuscripts 2 and 3 tested the intra-individual relationship between state affect and task performance, with a focus on the moderating effects of trait affect and task difficulty (Manuscript 2), and the mediating effects of cognitive and affective regulation (Manuscript 3). Each manuscript analysed different portions of data from two laboratory experiments (N = 182). In each experiment, participants performed multiple trials of an air-traffic control simulation that varied in task difficulty at the inter-individual (Study 4) or intra-individual (Study 5) level. Trait positive and negative affect were measured before the task, whereas state positive and negative affect, cognitive and affective regulation, and task performance were measured at repeated intervals over practice. In Manuscript 2, hierarchical linear modelling demonstrated that state positive affect was positively related, whereas state negative affect was negatively related, to task performance at the intra-individual level of analysis. As hypothesised, the strength of these affect-performance relationships was significantly moderated by trait affect and task difficulty. In both studies, the positive intra-individual relationship between state positive affect and performance was stronger for individuals with high (versus low) trait positive affect, particularly when task difficulty was high (versus low). In contrast, the negative intra-individual relationship between state negative affect and performance only emerged for individuals with low (versus high) trait negative affect, regardless of the level of task difficulty. In Study 4, the intra-individual relationship between state negative affect and task performance was also more pronounced when task difficulty was high (versus low). In Manuscript 3, multilevel multiple-mediation modelling demonstrated that cognitive regulation significantly mediated the intra-individual relationship between state positive affect and performance in both studies, alongside the intra-individual relationship between state negative affect and performance in Study 4. Unexpectedly, affective regulation failed to mediate either of these affect-performance relationships. However, state positive affect was positively related to affective regulation in both studies, whereas state negative affect was positively related to affective regulation in Study 5. Overall, this thesis makes theoretical, empirical and methodological contributions to understanding how affect relates to performance at the intra-individual level of analysis; and for whom, when, and why these relationships emerge. Within a multilevel framework, it integrates interdisciplinary perspectives to identify the affective determinants of performance from two levels of analysis. The results demonstrate that state positive and negative affect can differentially predict intra-individual variability in task performance, and that these effects may a) depend on trait affect and task difficulty; and b) be partially explained by cognitive regulation. These findings emphasise the importance of adopting a multilevel, repeated measures paradigm to examine how affective states, traits, and task demands interactively predict task performance. There is scope for extending this research further by investigating a broader range of moderating and mediating constructs. Practical implications and directions for future research are discussed.

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