Social and Behavioral Sciences Commons^™

Child And Adolescent Sleep Disturbances And Psychopathology In A Mental Health Clinic Sample, Aviva Blacher

Electronic Thesis and Dissertation Repository

Sleep disturbances in children and adolescents (hereafter children) are associated with significant short-term and long-term impairments including more severe psychopathology, reduced cognitive functioning, and poorer general health. We know that children being treated in specialty mental health services are more likely to have sleep disturbances than community samples. We also know that relationships exist between sleep and psychopathology in children with specific disorders (e.g. ADHD, depression, etc.). However, few studies have investigated the relationship between sleep and psychopathology in a broad sample of children seen at mental health agencies. Both child factors and family factors may influence both sleep and …

In Search Of Psychiatric Kinds: Natural Kinds And Natural Classification In Psychiatry, Nicholas Slothouber

Electronic Thesis and Dissertation Repository

In recent years both philosophers and scientists have asked whether or not our current kinds of mental disorder—e.g., schizophrenia, depression, bipolar disorder—are natural kinds; and, moreover, whether or not the search for natural kinds of mental disorder is a realistic desideratum for psychiatry. In this dissertation I clarify the sense in which a kind can be said to be “natural” or “real” and argue that, despite a few notable exceptions, kinds of mental disorder cannot be considered natural kinds. Furthermore, I contend that psychopathological phenomena do not cluster together into kinds in the way that paradigmatic natural kinds (e.g., chemical …

How Do Humans Process Magnitudes? An Examination Of The Neural And Cognitive Underpinnings Of Symbols, Quantities, And Size In Adults And Children, Helen Moriah Sokolowski

Electronic Thesis and Dissertation Repository

A striking way that humans differ from other species is our unique ability to represent and manipulate symbols. This ability to process numerical magnitudes symbolically (e.g., ‘three’, ‘3’) is widely thought to be supported by an ancient system that evolved to process nonsymbolic numerical magnitudes (i.e., quantities). In this thesis, I present four empirical studies to uncover whether symbolic representations are indeed supported by the system that evolved to process quantities, or if symbolic representations are sub-served by a similar but ultimately distinct system.

In experiments 1 and 2, I investigate how the adult brain processes symbols and quantities using …

How Does The Brain Represent Digits? Investigating The Neural Correlates Of Symbolic Number Representation Using Fmri-Adaptation, Celia Goffin

Electronic Thesis and Dissertation Repository

How does the brain represent numerical symbols (e.g., Arabic digits)? Activity in left parietal regions correlates with symbolic number processing. Research with functional resonance imaging adaptation (fMRI-A) indicates that the intraparietal sulcus (IPS) exhibits a rebound (increase in activation) effect when a repeatedly presented number is followed by a new number. Importantly, this rebound effect is modulated by numerical ratio as well as the difference between presented numbers (distance). This ratio-dependent rebound effect could reflect a link between symbolic numerical representation and an approximate number system (ANS). In this doctoral dissertation, fMRI-A is used to investigate mechanisms underlying symbolic number …

Cognitive, Neural, And Educational Contributions To Mathematics Performance: A Closer Look At The Roles Of Numerical And Spatial Skills, Zachary C.K. Hawes

Electronic Thesis and Dissertation Repository

The principal aims of this thesis were to (1) provide new insights into the cognitive and neural associations between spatial and mathematical abilities, and (2) translate and apply findings from the field of numerical cognition to the teaching and learning of early mathematics.

Study 1 investigated the structure and interrelations amongst cognitive constructs related to numerical, spatial, and executive function (EF) skills and mathematics achievement in 4- to 11-year old children (N=316). Results revealed evidence of highly related, yet separable, cognitive constructs. Together, numerical, spatial, and EF skills explained 84% of the variance in mathematics achievement (controlling for chronological age). …

Pilot And Adaptation Of A Social-Emotional Learning Program In Youth Justice Settings, Amanda J. Kerry

Electronic Thesis and Dissertation Repository

Interventions for youth offenders should aim to reduce risk factors and promote protective factors. Social-emotional learning (SEL) programs aim to enhance intrapersonal, interpersonal, and cognitive competencies. Research demonstrates that SEL programs reduce antisocial behaviours and improve prosocial skills; however, to date, SEL programs have been primarily implemented in schools. This integrated-article dissertation explored the feasibility and preliminary outcomes of implementing a SEL program in youth justice settings. The first paper proposes the implementation of SEL programs in youth justice settings and identifies unique programming and implementation considerations for this population.

The second paper presents a two-phase study examining the feasibility, …

Police Prevention Of Domestic Homicide: Missed Opportunities And Barriers To Change, Michael D. Saxton

Electronic Thesis and Dissertation Repository

This integrated-article dissertation focused on the critical role of police in responding to domestic violence (DV) and recognizing the potential risk of adult and child homicides. The first study examined the police role in domestic homicide through an analysis of cases reviewed by the Domestic Violence Death Review Committee in Ontario, Canada. Homicide cases with police contact were found to have 1.6 times more risk factors compared to those without police contact. Cases also show an overall scarcity of formal risk assessments, even when there was prior police contact. The second study was a national survey on the types of …

The Origins And Development Of Visual Categorization, Laura Cabral

Electronic Thesis and Dissertation Repository

Forming categories is a core part of human cognition, allowing us to make quickly make inferences about our environment. This thesis investigated some of the major theoretical interpretations surrounding the neural basis of visual category development. In adults, there are category-selective regions (e.g. in ventral temporal cortex) and networks (which include regions outside traditional visual regions—e.g. the amygdala) that support visual categorization. While there has been extensive behavioural work investigating visual categorization in infants, the neural sequence of development remains poorly understood. Based on behavioral experiments, one view holds that infants are initially using subcortical structures to recognize faces. Indeed, …

Development And Validation Of A Battery Of Emotionally Evocative Film Clips For Use With Young Children, Lindsay Gabel

Electronic Thesis and Dissertation Repository

Investigating normative and maladaptive emotional development requires the ability to elicit children’s reactivity to a range of affective stimuli. However, the field lacks a validated battery of stimuli tapping a broad range of childhood emotions. We therefore sought to validate a developmentally appropriate battery of emotionally evocative film stimuli, covering a range of affective responses, for use with children. During pilot work, clips were verified as age-appropriate by parents of young children. Next, during a laboratory visit, 39 children (22 girls; M_age = 7.19 years, SD = .76) viewed 20 film clips thought likely to elicit either positive affect, …

Investigating The Effects Of Parent Dispositional Mindfulness, Parent-Child Conflict And Stress On Children's Self-Regulation, Cassandra Trevisani

Electronic Thesis and Dissertation Repository

A mixed-methods research design was employed to explore (a) how parent-child conflict, parent dispositional mindfulness and child sex were related to parental stress and children’s self-regulation and, (b) how parents at different levels of dispositional mindfulness describe their children’s strengths and challenges. Data were gathered from 106 Canadian parents (n = 97 mothers, Mean age = 36.24, SD = 3.95) who provided reports of their parent-child conflict, dispositional mindfulness, stress, their child’s self-regulation and children’s strengths and challenges at home (N = 106 children, boys = 50, Mean age = 5.95, SD = 0.48). Path analysis demonstrated that …