Evaluating the Relationship Between Minority Stress and Working Memory: the Influence of Psychological Distress and Identity Valence
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EVALUATING THE RELATIONSHIP BETWEEN MINORITY STRESS AND WORKING MEMORY: THE INFLUENCE OF PSYCHOLOGICAL DISTRESS AND IDENTITY VALENCE A Dissertation Submitted to The Temple University Graduate Board In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY By Paul C. Jones August 2017 Examining Committee Members: Laura P. Pendergast, PhD, Advisory Chair, College of Education, Temple University Catherine A. Fiorello, PhD, College of Education, Temple University Janice H. Laurence, PhD, College of Education, Temple University Armando X. Estrada, PhD, College of Education, Temple University ii © Copyright 2017 by Paul C. Jones All Rights Reserved iii ABSTRACT The minority stress theory proposes that higher rates of mental illness among individuals who identify as lesbian, gay, or bisexual result from various factors that one may experience as a function of their minority status (Meyer, 1995, 2003). Such factors include internalized homophobia, concealment of one’s sexual identity, and the experiences of discrimination and rejection, whether real or perceived. This study investigated the relationship between minority stress and working memory. Based on the well documented research finding of the higher prevalence of mental illness among individuals who identify as lesbian, gay, or bisexual, relative to their heterosexual counterparts (S. D. Cochran, Sullivan, & Mays, 2003; Hatzenbuehler, 2009; Mays & Cochran, 2001), it was hypothesized that higher levels of minority stress would predict higher levels of psychological distress. In addition, models of chronic stress have predicted that individuals who are under constant stress conditions are more likely to have working memory deficits (Egeland et al., 2005; Schmader & Johns, 2003). Thus, it was hypothesized that the relationship between minority stress and working memory would be mediated by psychological distress. Identity valence is the evaluation of one’s identity and could be either positive or negative (Ashmore, Deaux, & McLaughlin-Volpe, 2004; Meyer, 2003). It was hypothesized that identity valence would further mediate the relationship between minority stress and working memory. Participants included 309 adults who identify as lesbian, gay, or bisexual (LGB), recruited via community-based and snowball sampling techniques (Meyer & Colten, 1999; Meyer & Wilson, 2009). Structural equation modeling (SEM) was utilized to examine direct and indirect effects of the relationship between minority stress and working memory. Results indicated that iv higher levels of working memory predict higher levels of psychological distress. Further, the relationship between minority stress and working memory was mediated through psychological distress and rumination. Finally, identity valence did not have the protective factor that was hypothesized and demonstrated in previous literature (Kertzner, Meyer, Frost, & Stirratt, 2009; Meyer, 2003). Rather, higher levels of identity valence predicted higher levels of psychological distress. Implications, strengths, limitations, and directions for future research are discussed. v ACKNOWLEDGMENTS First, to my advisor, mentor, and dissertation committee chair, Dr. Laura Pendergast, for her expertise, time, and feedback throughout my doctoral studies, I extend my deepest appreciation. With her continued support, I have accomplished a daunting task. Great thanks are due to my dissertation committee members, Dr. Catherine Fiorello, Dr. Janice Laurence, and Dr. Armando Estrada. Their expertise and encouragement throughout this process have been invaluable. To my family and friends who have supported my seemingly endless graduate school career, I offer sincere thanks for putting up with me and encouraging me to go further. Finally, to my partner and husband, Ron, who never left my side through the ups and downs of this process, whose words of encouragement were often underappreciated during the most stressful of times, and who would do anything to see me succeed, I do not have the words to express my gratitude. v vi TABLE OF CONTENTS Page ABSTRACT ........................................................................................................................ ii ACKNOWLEDGEMENTS ............................................................................................... iii LIST OF TABLES ............................................................................................................ iiii LIST OF FIGURES .............................................................................................................v CHAPTERS 1. INTRODUCTION .........................................................................................................1 2. LITERATURE REVIEW ..............................................................................................4 Stress and Outcomes of Stress ................................................................................ 4 Coping with Stress ...................................................................................... 6 Effects of Stress .......................................................................................... 8 Minority Stress and Psychological Distress .............................................. 10 Executive Functioning and Stress ......................................................................... 11 Executive Functions .................................................................................. 12 Assessment of Executive Function ........................................................... 15 Effects of Stress on Executive Functions .............................................................. 16 Identity Development............................................................................................ 21 vi Two Bases for Determining Identity......................................................... 22 Cognitive Vulnerability-Stress Models................................................................. 30 Purpose of the Current Study ................................................................................ 33 Research Questions ................................................................................... 35 vii 3. METHODOLOGY ......................................................................................................38 Participants ............................................................................................................ 38 Recruitment ........................................................................................................... 38 Measures ............................................................................................................... 39 Demographic Variables ............................................................................ 39 Heterosexist Harassment, Rejection, and Discrimination Scale ............... 39 Internalized Homophobia Scale ................................................................ 40 Stigma Consciousness Questionnaire for Gay Men and Lesbians............ 40 Outness Inventory ..................................................................................... 41 Collective Self-Esteem Scale .................................................................... 42 Ruminative Responses Scale .................................................................... 42 Hopkins Symptom Checklist-58 ............................................................... 43 Perceived Stress Scale............................................................................... 43 Behavior Rating Inventory of Executive Function-Adult Version ........... 44 Procedure .............................................................................................................. 44 Data Analysis ........................................................................................................ 45 Measurement Model ................................................................................. 46 Structural Model ....................................................................................... 48 4. RESULTS ....................................................................................................................50 Descriptive Statistics ............................................................................................. 50 Measurement Model ............................................................................................. 56 Confirmatory Factor Analysis ................................................................... 56 Specification of the Measurement Model ................................................. 81 viii Structural Equation Model ........................................................................ 85 5. DISCUSSION ..............................................................................................................96 Purpose of the Current Study ................................................................................ 96 Review of Findings ............................................................................................... 97 Minority stress and psychological distress ............................................... 97 Psychological distress and rumination ...................................................... 99 Minority stress and working memory ....................................................... 99 Strengths of the Present Study ............................................................................ 101 Limitations .........................................................................................................