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Examining The Role Of Episodic And Semantic Networks In Anhedonia: Applying The Accessibility Model Of Emotional Self-Report To Psychometrically-Defined Schizotypy, Kyle Robert Mitchell
Examining The Role Of Episodic And Semantic Networks In Anhedonia: Applying The Accessibility Model Of Emotional Self-Report To Psychometrically-Defined Schizotypy, Kyle Robert Mitchell
LSU Master's Theses
Individuals with schizophrenia exhibit a range of abnormalities in self-reported non-current experience of pleasure, but undisrupted current experience of pleasure. Several researchers have sought to address the mechanism of this deficit, yielding useful models of anhedonia. The accessibility model of emotional self-report suggests that deficits in hedonic response are due to differential activation of, and reliance upon, semantic and episodic memory systems. While this model has been proposed as an explanation of the deficits in hedonic response in schizophrenia, it has not been experimentally validated, and it remains to be seen whether the model will hold across the schizophrenia spectrum. …
Effort-Based Decision-Making In Schizotypy, Jessica Elaina Mcgovern
Effort-Based Decision-Making In Schizotypy, Jessica Elaina Mcgovern
LSU Master's Theses
Avolition/apathy, defined as reduced initiation of or persistence in goal-directed behavior, is a pernicious, core negative symptom of schizophrenia. While deficits in effort-based decision-making have been proposed to underlie negative symptom deficits, it remains unknown whether subjective or objective motivation deficits are evident in individuals with elevated schizotypy, a trait associated with putative latent liability of developing psychosis. Thus, the present study examined whether and how objective and subjective motivation deficits manifest in individuals high (n = 57) versus low (n = 58) in schizotypy traits (based on a median-split of total experience scores on the Schizotypal Personality Questionnaire –Brief …
Schizotypy: The Dynamic Relationship Between Trait And State Processes, Rebecca K. Macaulay
Schizotypy: The Dynamic Relationship Between Trait And State Processes, Rebecca K. Macaulay
LSU Master's Theses
Importantly, elevations in emotional reactivity to stress are often found in individuals vulnerable for psychosis. This study investigated several meaningful factors that appear to either increase vulnerability to stress (degree of schizotypy traits, trait negative affect, low perceived control, and impaired selective attention), or increase resiliency to stress (trait positive affect). A modified Posner spatial-cueing task utilizing affective cues was employed to assess selective attention within a neutral and an uncontrollable stressor condition. Between group differences (high, medium and low in schizotypy traits) and interactions between affective traits, state affect, and perceived control were evaluated in order to shed light …
The Moderating Effects Of Perceived Intentionality: Exploring The Relationships Between Ideas Of Reference, Paranoia, And Social Anxiety In Schizotypy, Sean Cameron Morrison
The Moderating Effects Of Perceived Intentionality: Exploring The Relationships Between Ideas Of Reference, Paranoia, And Social Anxiety In Schizotypy, Sean Cameron Morrison
LSU Master's Theses
Ideas of reference (IOR), paranoia, and social anxiety are three common symptoms of schizophrenia-spectrum disorders, which appear to be conceptually related. However, the precise nature of these relationships is unclear. A new measure that assesses perceived intentionality (PI), a social-cognitive bias for perceiving the actions of others during unpleasant social situations as being directed at oneself in an intentionally malicious manner, has provided preliminary evidence for a link between PI and paranoia. The primary aim of this study was to examine the moderating role of PI on the relationships between IOR and paranoia, and between IOR and social anxiety amongst …
Affective Reactivity Of Speech Disturbances In Schizotypy, Kyle Stuart Minor
Affective Reactivity Of Speech Disturbances In Schizotypy, Kyle Stuart Minor
LSU Master's Theses
Speech disturbances (SD) are a stable, pernicious symptom of schizophrenia that increase when negative emotion and/or arousal are elicited. While considerable research has examined SD in patients with schizophrenia, much less is known about individuals at risk for the disorder, who demonstrate schizophrenia-like, or schizotypic, traits. The present study examined SD and speech reactivity to stress, termed affective reactivity (AR), produced during a laboratory procedure in separate groups of controls and individuals with psychometrically identified schizotypy. This project had two primary aims: 1) to examine SD severity across schizotypy symptoms and 2) to examine how SD varies as a function …