Objective:To explore the mediating effect of coping styles on the relationship between reinforce-ment sensitivity and non-suicidal self-injury(NSSI)behavior in adolescents.Methods:In total,4 462 middle school students were chosen by stratified cluster random sampling.All participants were asked with the question"In the past 1 year,have you intentionally harmed yourself(but not with the intention of ending your life)"to determine whether they had NSSI behavior in the past 12 months.All students were also assessed with the Trait Coping Style Questionnaire(TCSQ)and Reinforcement Sensitivity Scale(RSS).Results:The prevalence of NSSIbehavior in past year was 11.3％.Logistic regression analysis showed that the total scores of punishment sensitivity of RSS(OR=1.26,95％CI=1.10-1.46),negative coping style of TCSQ(OR=2.23,95％CI=1.92-2.60),and positive coping style of TCSQ(OR=0.70,95％CI=0.62-0.80)were associated with the screen-positive rate of NSSI behavior.Bootstrap test showed that the total scores of positive coping style of TCSQ(β=0.15,95％CI=0.10-0.20)and negative coping style of TCSQ(β=0.53,95％CI=0.43-0.64)partially mediated the relation-ship between the total scores of punishment sensitivity of RSS and the screen-positive rate of NSSI behavior in ado-lescents.Conclusion:The occurrence of NSSI behavior in adolescents is associated with the over-activation of pun-ishment sensitivity,partly through coping styles.

Objective:To explore the mediating effect of coping styles on the relationship between reinforce-ment sensitivity and non-suicidal self-injury(NSSI)behavior in adolescents.Methods:In total,4 462 middle school students were chosen by stratified cluster random sampling.All participants were asked with the question"In the past 1 year,have you intentionally harmed yourself(but not with the intention of ending your life)"to determine whether they had NSSI behavior in the past 12 months.All students were also assessed with the Trait Coping Style Questionnaire(TCSQ)and Reinforcement Sensitivity Scale(RSS).Results:The prevalence of NSSIbehavior in past year was 11.3％.Logistic regression analysis showed that the total scores of punishment sensitivity of RSS(OR=1.26,95％CI=1.10-1.46),negative coping style of TCSQ(OR=2.23,95％CI=1.92-2.60),and positive coping style of TCSQ(OR=0.70,95％CI=0.62-0.80)were associated with the screen-positive rate of NSSI behavior.Bootstrap test showed that the total scores of positive coping style of TCSQ(β=0.15,95％CI=0.10-0.20)and negative coping style of TCSQ(β=0.53,95％CI=0.43-0.64)partially mediated the relation-ship between the total scores of punishment sensitivity of RSS and the screen-positive rate of NSSI behavior in ado-lescents.Conclusion:The occurrence of NSSI behavior in adolescents is associated with the over-activation of pun-ishment sensitivity,partly through coping styles.