title: The influence of self-relevant materials on working memory in dysphoric undergraduates.
abstract: Difficulties in updating working memory (WM) may underlie problems with regulating emotions that contribute to depression. To examine the ability of updating affective materials in WM, 33 dysphoric and 34 non-dysphoric participants were asked to evaluate the self-descriptiveness of emotional adjectives and provide answers to self-relevant questions. Within 3-7 days, they completed a two-back task with a series of self-irrelevant or self-relevant emotional words (they had generated previously) and four conditions (match-set, break-set, perseveration-set, and no-set). After the WM task, an unexpected recall task was administered; controls recalled more positive self-relevant words and intrusions while dysphoric participants recalled more negative self-relevant words and intrusions. In break-set trials of the two-back task, dysphoric individuals showed slower response to self-relevant words regardless of valence. In the match-set and perseveration-set trials, dysphoric participants showed delayed response to self-related negative words. Moreover, longer reaction times for self-relevant negative words were correlated with higher rumination and worse depression. The results suggest that dysphoric undergraduates are interfered more by and have a better memory of self-relevant negative stimuli in WM, which is closely correlated with rumination. This study is among the first to confirm the potential mechanism that could underwrite the involvement of self-schema in effectively regulating negative affect.
authors.affiliation: Department of Psychology, University of Michigan, MI, USA; Department of Nursing, Third Military Medical University, Chong Qing, China. Electronic address: daiqin101@hotmail.com.
authors.forename: Qin
authors.initials: Q
authors.lastname: Dai
authors.affiliation: Department of Psychology, University of Michigan, MI, USA.
authors.forename: Shaoon
authors.initials: S
authors.lastname: Rahman
authors.affiliation: Department of Psychology, University of Michigan, MI, USA.
authors.forename: Becky
authors.initials: B
authors.lastname: Lau
authors.affiliation: Department of Psychology, University of Michigan, MI, USA; Department of Psychology, Sogang University, Seoul, South Korea.
authors.forename: Hyang
authors.initials: H
authors.lastname: Sook Kim
authors.affiliation: Department of Psychology, University of Michigan, MI, USA. Electronic address: pjdeldin@umich.edu.
authors.forename: Patricia
authors.initials: P
authors.lastname: Deldin
mesh_terms: D000328:Adult; D003863:Depression / Q000503:physiopathology / Q000523:psychology*; D003866:Depressive Disorder / Q000503:physiopathology / Q000523:psychology*; D004644:Emotions; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D011939:Mental Recall / Q000502:physiology*; D011930:Reaction Time; D019455:Self Psychology; D013334:Students / Q000523:psychology; D055815:Young Adult
keywords: Depression; Dysphoric; Rumination; Self-relevance; Working memory