Theses and Dissertations from UMD
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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM
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Item Experience and Expression of Emotion in Social Anhedonia: An Examination of Film-Induced Social Affiliative State in Schizotypy(2006-08-02) Leung, Winnie; Blanchard, Jack; Psychology; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)Social anhedonia is an important feature of schizophrenia and it is a promising indicator of schizotypy. Although social anhedonia is defined as an affective construct (less pleasure derived from social encounters), little is actually known about the affective correlates of social anhedonia. Prior laboratory research is limited in that no prior study has used affiliative social stimuli in examining affective reactions associated with anhedonia. This study sought to extend prior research through an examination of the expression and experience of emotion in social anhedonics by using a novel social affiliative film stimulus. After screening a large sample of female undergraduate students (N = 1,085), a cohort of psychometrically identified social anhedonics (n = 34) and normally hedonic controls (n = 45) participated in laboratory assessments involving trait affectivity, self-reported dispositional emotional expressiveness, and the expression and experience of emotion in response to neutral, non-affiliative (i.e., comedy) and affiliative film clips. Results showed that social anhedonics have lower trait positive affect compared to controls, but there were no group differences in trait negative affect. At baseline, social anhedonics reported lower state positive affect and less warmth and affection compared to controls, but there were no group differences in state negative affect. Social anhedonics also reported the disposition to be less expressive. Consistent with their reports of attenuated emotional experience and expression outside of the laboratory, social anhedonics reported less positive affect and displayed less facial expressions in response to affect eliciting films in the laboratory. Social anhedonics, however, did not report less warmth and affection across the films as compared to controls. Additionally, social anhedonics did not report less positive emotions or warmth and affection in response to the affiliative film, as compared to the non-affiliative (i.e., comedy) film. Implications and study limitations are discussed.Item Behavioral Indicators of Schizotypy in the Biological Parents of Social Anhedonics: A Preliminary Examination of the Familiality of Schizotypal Signs(2005-05-05) Collins, Lindsay M.; Blanchard, Jack J; Psychology; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)Social anhedonia appears to be related to risk for schizophrenia-spectrum disorders and thus is a promising indicator of Meehl's construct of schizotypy. Findings from diagnostic, cognitive, and psychophysiological studies have supported the validity of social anhedonia as an indicator of schizotypy, but only recently have the behavioral characteristics of these putative schizotypes been examined. This study replicated previous findings of atypical behavioral characteristics in social anhedonics and expanded upon prior research through an examination of their biological parents, serving as a preliminary investigation into the familiality of schizophrenia-spectrum behaviors. A community sample of 88 18- to 19- year-olds (48 social anhedonics, 40 controls) and their biological parents (42 mothers of social anhedonics, 37 mothers of controls; 24 fathers of social anhedonics, 20 fathers of controls) received diagnostic evaluations that were videotaped as part of an ongoing study and served as the basis for ratings of behavioral signs of schizoidia and schizotypy in the present study. Proband social anhedonics exhibited atypical interpersonal behaviors characteristic of schizoid and schizotypal personality disorders as well as clinical symptoms of schizoid and schizotypal personality disorders. Mothers of social anhedonics displayed atypical interpersonal behaviors characteristic of schizotypal personality disorder but did not show elevations on clinical symptoms of schizophrenia-spectrum personality disorders. Meaningful, though not statistically significant, effects were observed for behavioral sign ratings and clinical symptom ratings of schizoid and schizotypal personality disorders in the smaller sample of fathers of social anhedonics. Correspondence on schizoid behavioral ratings was observed for probands, particularly males, and their fathers. Results provide preliminary support for the familiality of atypical interpersonal behavior in social anhedonics, as putative schizotypes.