title: Peer group impulsivity moderated the individual-level relationship between depressive symptoms and adolescent nonsuicidal self-injury.
abstract: This study examined the influence of impulsive friendship group contexts on nonsuicidal self-injury (NSSI) and how peer group impulsivity (i.e. negative urgency and premeditation) moderated the individual level relationship between depression and NSSI among 1701 Chinese secondary school students (1147 females). Participants were assessed twice over a 6-month interval. After controlling for direct socialization effects for NSSI, multilevel analysis indicated that friendship group negative urgency exerted a significant influence on NSSI. Additionally, friendship group premeditation weakened the relation between individual depression and NSSI, while friendship group negative urgency strengthened the relation between depression and NSSI. The results suggest the contribution of indirect peer influence effects to NSSI.
authors.affiliation: Center for Studies of Psychological Application, Guangdong Key Laboratory of Mental Health and Cognitive Science, & School of Psychology, South China Normal University, Guangzhou, 510631, China. Electronic address: youjianing@gmail.com.
authors.forename: Jianing
authors.initials: J
authors.lastname: You
authors.affiliation: Department of Psychology, Peking University, Beijing, China.
authors.forename: Chuhua
authors.initials: C
authors.lastname: Zheng
authors.affiliation: Department of Educational Psychology and Counseling, National Taiwan Normal University, Taipei City, Taiwan, ROC.
authors.forename: Min-Pei
authors.initials: MP
authors.lastname: Lin
authors.affiliation: Department of Psychology, The Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Freedom
authors.initials: F
authors.lastname: Leung
mesh_terms: D000293:Adolescent; D003863:Depression / Q000209:etiology / Q000523:psychology*; D005260:Female; D033062:Friends / Q000523:psychology; D006801:Humans; D007175:Impulsive Behavior; D008297:Male; D010379:Peer Group; D011569:Psychiatric Status Rating Scales; D016728:Self-Injurious Behavior / Q000209:etiology / Q000523:psychology*
keywords: Depressive symptoms; Impulsivity; Negative urgency; Nonsuicidal self-injury; Peer influence; Premeditation