Physiological Activation As A Mediator In The Relationship Between Perseverative Cognition And Somatic Symptoms, Karly M. Murphy

Clinical Psychology Dissertations

Somatic symptoms are a significant medical and mental health concern that affects healthy adults and places a significant burden on healthcare systems. The perseverative cognition hypothesis posits that perseverative cognition results in prolonged physiological activation that may be interpreted as somatic symptoms. The purpose of this study was to further examine this hypothesis in a sample of young adults. First, I hypothesized that perseverative cognition would prospectively predict somatic symptoms after controlling for anxiety and depression. Second, I hypothesized that parasympathetic nervous system functioning, measured as respiratory sinus arrhythmia (RSA) and sympathetic nervous system functioning, measured as electrodermal responding (EDR) …

Stress And Somatic Symptoms: Rumination And Negative Affect As Moderators, Melissa Joy Garner

Clinical Psychology Dissertations

This study examined the relationships between stress, negative affect, rumination, and somatic symptoms among older adolescents. The following hypotheses were investigated: 1) greater number of life stressors would predict greater somatic symptoms, 2) rumination would moderate the relationship between stressors and somatic symptoms, 3) negative affect would also moderate the relationship between stressors and somatic symptoms, and 4) a three-way interaction between stress, rumination and negative affect would significantly predict somatic symptoms. Participants were 363 (71.1% female) university students with a mean age of 19.06 years (SD=2.06 years) who completed eight weekly online questionnaires, assessing levels of rumination …

The Abcs Of Stress Responding: Examining The Time Course Of Affective, Biological, And Cognitive Responses To Induced Stress As Prospective Predictors Of Depressive Symptoms, Marissa Erin Rudolph

Clinical Psychology Dissertations

Vulnerability-stress models of depression posit risk for depression is characterized by the presence of underlying affective, biological, and cognitive vulnerabilities that become activated during life stress exposure. Extant research has shown heightened reactivity to stress across these vulnerability domains predicts depression; however, little is known whether the persistence of and failure to down-regulate these maladaptive stress responses conveys greater risk of depression than initial reactivity alone. The current study examined associations between the time course of responses to a laboratory stress induction and depressive symptoms. I hypothesized that prolonged maladaptive responses to the stressor across affective (state negative affect; NA), …

Negative Cognitive Style, Rumination, And Negative Emotionality As Mediators Of The Antidepressive Effects Of Physical Activity Among Young Adults, Kara Pegram

Clinical Psychology Dissertations

Abstract

This study assessed whether three potential cognitive and affective mechanisms mediated the relationship between physical activity and depressive symptoms. Participants were 143 young adults between the ages of 18 and 29 (M = 19.29, SD = 1.65); the majority of participants were female (72%) and Caucasian (69.9%). Participants were followed across eight weeks and completed measures of trait and state rumination, negative emotionality, cognitive style, depressive symptoms, and physical activity. A mediated model was proposed hypothesizing negative association between physical activity and depression mediated by less rumination, negative emotionality, and cognitive style. Hypotheses were examined cross-sectionally and prospectively. …