Pitting long-term goals against short-term desires is among the most difficult tasks in human decision-making. According to behavioural and neuroeconomic theories of self-regulation, these decisions involve a competition between “hot” reward-focused impulses and “cool” cognitive control mechanisms. The current dissertation examines this topic from the perspective of social and personality neuroscience, exploring the cognitive and affective dynamics underlying the self-regulatory process. Chapters 1 and 2 explore how the “hot” system is dispositionally expressed in the personality trait of Extraversion, and the implications of this finding for decision-making behaviour. Turning to the “cool” system, Chapter 3 examines the role of effective performance monitoring in predicting real-world self-regulatory outcomes. Finally, Chapter 4 addresses the question of whether self-regulatory performance can be improved, reporting the effects of a goal-setting intervention on long-term decision-making. Results across the studies are discussed within an integrative model of self-regulation, situated within a social-personality neuroscience framework.

Understanding the rational and ethical sense that people make of their actions and experiences requires understanding the lives they are trying to live. The narrative visions of a good life that are dominant in a society thus represent an important aspect of cultural orientation. To gain insight into the form and function of these visions, two studies were conducted. In Study 1, the various criteria by which people judge their lives as good or worthy were examined using multidimensional scaling of responses from four different cultural groups of students: Chinese, East Asian Canadian, South Asian Canadian, and Western European Canadian. The results revealed two underlying structural dimensions on which both criteria and cultural groups could be differentiated. One reflected the locus of criterial goods and the other their morality. The clearest cultural contrast was between Chinese participants, who tended toward the prudential, materialistic, and hedonistic pole of the morality dimension, and South Asians, who tended more toward the spirituality and beneficence pole. In Study 2, the content of personal narratives produced by Chinese and South Asian students was analyzed to examine whether their contrasting orientations to the good life would be reflected in the kinds of life experiences they recounted. Some evidence of correspondence in this regard was found.

A variety of statistical models have been developed to examine longitudinal stability and change of individual differences. Kenny and Zautra’s (1995) trait-state-error (TSE) model models stability as a function of stable variance that does not change (trait), moderately stable variance that changes over time (state), and error variance. Applications of this model have been limited to panel studies with repeated observations of the same individual. The present study developed a non-linear regression model to apply the TSE model to retest correlations from different samples. This model was used to compare the stability of measures of personality traits, affective well-being (AWB), cognitive well-being (CWB), and self-esteem. After correcting for differences in reliability, age, gender, and scale length, the amount of trait (vs. state) variance was similar across constructs. Stability of the state component was highest for AWB and CWB, suggesting that situational influences have most enduring effects on these two constructs.

A growing body of literature is focusing on the influence of personality and emotion regulation on psychological health. Using archival data from an expressive writing project, the current study investigated the relationship between perfectionistic self-presentation and emotion regulation, and the influence of the interaction of these variables on psychological health among trauma survivors. The results indicate that both perfectionistic self-presentation and more difficulties in emotion regulation contribute to symptoms of distress. As well, higher levels of perfectionistic self-presentation were associated with more difficulties in emotion regulation. Further, emotion regulation mediated the relationship between perfectionistic self-presentation and psychological distress but not common physical complaints. More specifically, the non-acceptance subscale of emotion regulation was found to be significant in a test of multiple mediator model.

Understanding the rational and ethical sense that people make of their actions and experiences requires understanding the lives they are trying to live. The narrative visions of a good life that are dominant in a society thus represent an important aspect of cultural orientation. To gain insight into the form and function of these visions, two studies were conducted. In Study 1, the various criteria by which people judge their lives as good or worthy were examined using multidimensional scaling of responses from four different cultural groups of students: Chinese, East Asian Canadian, South Asian Canadian, and Western European Canadian. The results revealed two underlying structural dimensions on which both criteria and cultural groups could be differentiated. One reflected the locus of criterial goods and the other their morality. The clearest cultural contrast was between Chinese participants, who tended toward the prudential, materialistic, and hedonistic pole of the morality dimension, and South Asians, who tended more toward the spirituality and beneficence pole. In Study 2, the content of personal narratives produced by Chinese and South Asian students was analyzed to examine whether their contrasting orientations to the good life would be reflected in the kinds of life experiences they recounted. Some evidence of correspondence in this regard was found.

A variety of statistical models have been developed to examine longitudinal stability and change of individual differences. Kenny and Zautra’s (1995) trait-state-error (TSE) model models stability as a function of stable variance that does not change (trait), moderately stable variance that changes over time (state), and error variance. Applications of this model have been limited to panel studies with repeated observations of the same individual. The present study developed a non-linear regression model to apply the TSE model to retest correlations from different samples. This model was used to compare the stability of measures of personality traits, affective well-being (AWB), cognitive well-being (CWB), and self-esteem. After correcting for differences in reliability, age, gender, and scale length, the amount of trait (vs. state) variance was similar across constructs. Stability of the state component was highest for AWB and CWB, suggesting that situational influences have most enduring effects on these two constructs.

Pitting long-term goals against short-term desires is among the most difficult tasks in human decision-making. According to behavioural and neuroeconomic theories of self-regulation, these decisions involve a competition between “hot” reward-focused impulses and “cool” cognitive control mechanisms. The current dissertation examines this topic from the perspective of social and personality neuroscience, exploring the cognitive and affective dynamics underlying the self-regulatory process. Chapters 1 and 2 explore how the “hot” system is dispositionally expressed in the personality trait of Extraversion, and the implications of this finding for decision-making behaviour. Turning to the “cool” system, Chapter 3 examines the role of effective performance monitoring in predicting real-world self-regulatory outcomes. Finally, Chapter 4 addresses the question of whether self-regulatory performance can be improved, reporting the effects of a goal-setting intervention on long-term decision-making. Results across the studies are discussed within an integrative model of self-regulation, situated within a social-personality neuroscience framework.

Popular music plays a significant role in the lives of most adolescents. The central question explored is whether three groups of adolescents (psychiatrically ill, depressed, and non-clinical adolescents) differed on self-reported data on: (a) the role of popular music in their lives, and (b) in their emotional reactions to music. The next question is whether the developmental issues of gender and personality consolidation, age, and school commitment simultaneously influence how the three groups of adolescents use music in their lives and in their emotional reactions to music. The last question is whether the three groups have significantly different music preferences in the five genres of popular (rap, pop/dance, heavy metal/hard rock, classic rock, and alternative). There were 126 subjects employed in this research. I created the Walker Music Questionnaire (WMQ) to explore the role and importance that music plays in the lives of the adolescents. A factor analysis found five factors (Introspection, Identity-Music, Discerning Music Identity, Fantasy-Rebellion, and Identity-Self). The Adolescent Semantic Differential Scales (ASDS) measured the adolescents’ emotional responses to 10 pieces of popular music representing the five genres described above. These scales are well known measures of emotional response and I added eight adjectives that represented adolescent issues. This measure was also factor analyzed and the three factors of Evaluation, Romance, and Potency emerged. Preference for the five genres was determined from the Adolescent Semantic Differential Scales. MANOVAS were done with both sets of factors derived from the WMQ and ASDS simultaneously using the developmental variables of age group, gender, personality, and school commitment. Psychological health was found to be a significant variable. Specifically, the role of music for the depressed group was significantly different from the other two groups of adolescents. The developmental issues that remained significant were personality and school commitment. Furthermore, the psychiatrically ill group reacted more emotionally to the music than the other two groups and this remained significant even when the developmental variable of personality was considered. The three groups were not differentiated by their preference ratings on the ASDS.

Callous-unemotional (CU) traits are associated with severe and aggressive youth antisocial behavior (ASB) and are under consideration as a potential specifier for the diagnosis of Conduct Disorder in DSM-5 (Frick & Moffitt, 2010). This proposal demands more inquiry into the impact that CU traits have on behavioral subtypes of youth ASB. Normal-range personality traits, trait levels of anxiety, and hormonal stress reactivity (i.e., changes in the stress hormone, cortisol) are all factors that have been studied extensively in relation to ASB, but these relationships have not yet been considered in combination with CU traits. The purpose of the current set of studies was to examine the extent to which CU traits moderated links between these three factors and both overall and behavioral subtypes of ASB. In the first study, data were collected on children’s personality, CU traits, and three behavioral categories of ASB (physical aggression, relational aggression and non-violent rule-breaking behavior) for community (N = 742) and clinical (N = 183) samples of children. In the community sample, CU traits moderated links between Neuroticism, Extraversion, Agreeableness, Openness to Experience and ASB overall and externalizing behaviors, between Neuroticism, Extraversion and physical aggression and between Agreeableness, Extraversion and rule-breaking behaviors. In the clinical sample, CU traits moderated the link between Agreeableness and externalizing behaviors. In the second study, data were collected on children’s trait anxiety, CU traits, and the same three behavioral categories of ASB in a follow-up adolescent community sample (N = 145). Reactivity of cortisol in response to an unanticipated social stress test was also measured. Results revealed that CU traits moderated links between trait anxiety and ASB overall, externalizing behaviors and physical aggression. In females only, CU traits also moderated links between cortisol reactivity and ASB overall and externalizing behaviors. Combined, the results of these studies support the proposal that CU traits are a clinically useful diagnostic specifier with different implications for behavioral subtypes of ASB. Further, the present findings allow recommendations to be made for future research to further our understanding of the role CU traits play in CD, and to develop targeted interventions.

Dimensional models of personality pathology present a promising approach to the assessment of maladaptive personality in adults and children (eg. De Clercq, De Fruyt, & Widiger, 2009). In addition, recent findings show that some childhood maladaptive traits can be predictive of adulthood personality disorders (eg. Mervielde, De Clercq, De Fruyt, & Van Leeuwen, 2005). The Dimensional Personality Symptom Item Pool (DIPSI) is a questionnaire designed to measure maladaptive lower and higher order traits in children and adolescents. This study aims to examine the DIPSI’s scales and to replicate several previous findings of maladaptive trait patterns in children. The results indicate that the DIPSI’s lower and higher order trait scales are high in reliability and show many of the trait relationships suggested by previous literature. A successful outcome of this study serves as the first step towards establishing the DIPSI as a valid and useful measure of personality pathology in children.