Typescript. / Digitized by Kansas Correctional Industries

No description available.

No description available.

A substantial amount of research has investigated the psychophysiological profiles of various mood and emotional states; however, very little research has investigated individuals� mood responses from a psychophysiological perspective. As a result, little is known about the psychophysiological reactivity of individuals to various mood-related responses, or the ability of psychophysiological measures to differentiate between response styles. Furthermore, most investigations in the area of mood-related response styles have relied on participants self-report responses of their mood reactivity, which is considered to be susceptible to demand characteristics and response bias. Psychophysiological measures are thought to offer a unique and alternative measure of mood reactivity that can corroborate, or challenge self-report findings. They are considered to be less susceptible to demand effects than self-report, and can detect subtle changes in mood reactivity activity when an overt response is not apparent. In view of this, the primary objective of this thesis was to move beyond a reliance on subjective self-report measurements of mood reactivity, and to investigate the consequences of depressed mood-related cognitive response styles from a psychophysiological perspective. As part of this investigation, this thesis aims to address a number of theoretical and practical questions relating to the use of psychophysiological measures in mood research and clinical practice. The research is divided into four studies, each one focusing on a particular aspect of the investigation. The aim of Study 1 was to select and trial a laboratory-based mood induction procedure (MIP) and a self-report mood measure, with the intention of developing a reliable method of inducing and measuring depressed mood. Two film clips that contained either positive or negative affective content were presented to participants. Self-report responses on the Mood Scale confirmed that the negative film clip elicited a very unpleasant mood state with high emotional arousal, and that the positive film clip elicited a mildly pleasant mood state with low emotional arousal. The positive and negative Film Clip MIPs were then used in Studies 2 and 2a, to investigate participants� psychophysiological reactivity to induced mood. The aim of Studies 2 and 2a was to identify a set of psychophysiological measures that would differentiate between participants� mood states. In Study 2, the positive and negative Film Clip MIPs, from Study 1, were again presented to participants. Corrugator supercilii facial EMG activity, zygomaticus major facial EMG activity, skin conductance activity (SCA), heart rate (plethysmograph, sphygmomanometer), systolic blood pressure, diastolic blood pressure, and self-report ratings on the Mood Scale were recorded. Results confirmed that participant self-reported affective responses were similar to those reported in Study 1; however, mixed results were obtained in regards to individuals� psychophysiological responses to the MIPs. Facial EMG activity and heart rate (plethysmograph) were consistent with participants� self-reported mood, whereas, SCA and systolic blood pressure were inconsistent with participants� self-reported mood. Diastolic blood pressure and heart rate (sphygmomanometer) did not differentiate between the MIPs. As the results were somewhat contradictory to expectations, it was decided to further investigate the psychophysiology of induced mood in Study 2a, using a revised set of psychophysiological measures. In Study 2a, the positive and negative Film Clip MIPs were again presented to participants. Corrugator supercilii facial EMG activity, zygomaticus major facial EMG activity, SCA, heart rate (ECG), and finger temperature, were recorded along with participants� Mood Scale ratings. It was found that facial EMG activity and SCA, paralleled participant self-report as expected, and were most responsive to participants� change in mood state. Heart rate (ECG) and finger temperature did not clearly differentiate between the induced mood states. The aim of Study 3 was to conduct an experimental, laboratory-based investigation, into the psychophysiological and subjective mood consequences of two cognitive response styles: self-focused depressive rumination and external-focused distraction. As in the previous study, the negative Film Clip MIP and the Mood Scale were used to induce depressed mood and to measure participants� subjective mood state. Psychophysiological reactivity was recorded by measuring participants� corrugator supercilii facial EMG, zygomaticus major facial EMG, SCA, heart rate (sphygmomanometer), systolic blood pressure, and diastolic blood pressure. Trait response style was measured using the Response Style Questionnaire (RSQ; Nolen-Hoeksema & Morrow, 1991) and social desirability was measured using the Marlowe Crowne-Social Desirability Scale (MC-SDS; Crowne & Marlowe, 1960). As predicted by the Response Style Theory of depression (RST), increased self-reported negative mood was found when participants responded to the induced depressed mood, using a self-focused depressive rumination response style, rather than an external-focused distraction response style. Psychophysiological activity increased over the course of the negative Film Clip MIP for all psychophysiological measures, however, only corrugator supercilii facial EMG activity clearly differentiated between the cognitive response styles, in a way predicted by individuals� self-report responses. There was no evidence of a relationship between participants� trait response style and their psychophysiological reactivity or mood responses during the experiment. However, individuals high in trait rumination reported greater depressive symptomatology, and less mood reactivity during the experiment, than those high in trait distraction. Furthermore, participants� ratings of social desirability were positively associated with their level of depressive symptomatology and trait rumination. The aim of Study 4 was to conduct a pilot study to investigate the psychophysiological consequences of two further cognitive response styles: negative automatic thoughts and positive autobiographical recall. A series of twelve single-case (ABC-ABC) experiments were carried out using a procedure analogous to a clinical therapy process. Initially a depressed Story MIP was used to induce a depressed mood in participants (A). Participants were then required to respond to their depressed mood using negative self-statements (B), and positive autobiographical recall (C). Consistent with previous studies, zygomaticus major facial EMG and corrugator supercilii facial EMG clearly paralleled participants� mood reactivity throughout the experiment, whereas SCA and heart rate showed less consistent patterns of reactivity. This thesis has made an important contribution to mood and psychophysiological research by presenting the first in-depth investigation into the psychophysiological consequences of how people respond to depressed mood, from both a theoretical and a clinical perspective. It is anticipated that the findings of this research will bring about further investigation into the comparative efficacy of various brief mood-related cognitive intervention techniques, which will ultimately assist scientist-practitioners in selecting suitable brief cognitive intervention techniques for helping clients ameliorate their negative mood, emotional, and cognitive states.

Thesis (PH. D.)--University of Chicago, 1909. / Includes bibliographical references. Also available on the Internet.

This study examined the distinguishing physiological characteristics of the disgust reaction across different domains. According to an evolutionary analysis, disgust is a heterogeneous emotion with features that are specific to three distinct domains: pathogens, sex, and morality. Each domain is predicted to take as input information specific to the adaptive problem it evolved to solve and regulate behavior accordingly. The goal of the present study was to investigate whether there are any adaptive physiological differences associated with the disgust response across domains. Participants were asked to imagine acts that elicit pathogen, sexual, and moral disgust. It was hypothesized that there would be both quantitative and qualitative differences in the physiological reactions based on the appropriate functional outputs for the social (moral and sexual) and nonsocial (pathogen) domains. Individual differences in self-report ratings of disgust as well as the role of religiosity in regulating social disgust were also explored. Results showed significant differences in parasympathetic influences on the heart in response to the sexual stimuli but not to the other domains. Also, the self-report ratings showed that females were more sensitive than males to the sexual stimuli but not to pathogens or moral acts. These results lend further support to the dissociation between the functional domains of disgust. Correlations between levels of religiosity and both subjective ratings of fear towards pathogens and levator labii activation when viewing pathogen stimuli were found. This study provides preliminary evidence of dissociations between different domains of disgust and provides a methodological guideline which can help inform future studies of disgust. Implications of the current findings are discussed, as well as limitations of the current methodology and avenues for further exploration.

Thesis (Ph. D.)--Leland Stanford junior university, 1912. / Biography. "Published as no. 87 of the Psychological monographs." Bibliography: p. [243]-255. Also available in digital form on the Internet Archive Web site.

The current study examined affective reactivity to oneself in an upward socialcomparison manipulation using autonomic physiological responses. Study I was conducted to select images of thin and average size models used to elicit a social comparison process for Study II. For Study II, thirty-two female undergraduate students had their startle reflex and skin conductance responses recorded while viewing images of themselves presented adjacent to thin or average size models. Participants also viewed positive, negative, and neutral affect images to test our experimental manipulation of Peter Lang’s startle paradigm. Following the visual presentation, participants used the SAM scale to rate each image along the dimensions of valence, arousal, dominance, body satisfaction, and attractiveness. Analyses revealed that participants reacted to thin and average size models and self with similar levels of body image satisfaction, valence, and arousal, even though thin models were perceived as highly more attractive. Positive affect images were rated higher on valence and arousal among all the picture types. With regards to the psychophysiological data, there were differences in startle reactivity among the three model-to-self comparison images, with images of Thin-to-Self Comparison eliciting more of an inhibited startle response and Thin-to-Average Comparison images eliciting more of a potentiated startle response. In terms of arousal, positive affect images were perceived as more arousing among all the picture types. Contrary to what was expected, there were no significant differences in skin conductance responsiveness between the three model-to self comparison images. The results are discussed from a social-comparison perspective with regard to affective reactivity to body image. Future research directions are proposed.

Thesis (Ph. D.)--University of California, San Diego and San Diego State University, 2001. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--University of Oregon, 2001. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 92-98). Also available for download via the World Wide Web; free to University of Oregon users.