Relationship Between Negative Life Events And Suicidal Ideation:the Mediating Role Of Rumination And The Moderating Role Of Dispositional Optimism

As a global mental issue,great attention has been paid to suicide in the field of mental health.Especially,in recent years,suicide among college students has been highly valued by all sectors of society.Therefore,paying attention to the risk factors and protective factors of college students'suicidal ideation is a great significance to reduce the generation of suicidal ideation.Negative life events are the main sources of stress and risk factors causing college students' suicide.It is easy for college students to choose negative coping styles,which in turn leads to suicidal ideation or suicidal behavior if they are under a state of stress for a long time.Rumination is an important cognitive risk factor for suicidal ideation,individuals constantly thinks about negative events and react negatively,making it impossible to dissociate from negative cognition,which will promote the formation of suicidal ideation.Previous studies have mostly explored the risk factors of suicide.With the rise of positive psychology,the protective factors of suicide have gradually gained attention.According to the buffering hypothesis of suicide,as an important positive psychological trait,dispositional optimism is a protective factor for individuals to fight with risk factors.It can mediate the relationship between rumination and suicidal ideation,and effectively alleviate the influence of negative factors on suicidal ideation.In conclusion,this study constructed a moderated mediation model to examine whether rumination mediated the relationship between negative life events and college students' suicidal ideation,and whether this mediating process was moderated by dispositional optimism from the perspective of positive psychology.For this purpose,1191 college students were recruited to participate in this study with Beck Scale for Suicide Ideation,Adolescent Self-Rating Life Events Check List,Rumination Response Scale-Chinese Version and The Life Orientation Test-revised.Results were as follows:(1)There are significant differences in negative life events,rumination and dispositional optimism between the group with suicidal ideation and the group without suicidal ideation;(2)Suicidal ideation are positively correlate with negative life events and rumination,and negatively correlated with dispositional optimism.There is a significant negative correlation between rumination and temperamental optimism.After controlling for gender,negative life events are significantly positive predictors of suicidal ideation;(3)Rumination mediated the relationship between negative life events and college students' suicidal ideation;(4)Dispositional optimisn moderated the mediated path through rumination.This study concludes that:(1)Negative life events significantly positively predicted the suicidal ideation;(2)Rumination played a mediating role in the relationship between negative life events and suicidal ideation;(3)Dispositional optimism moderated the mediated path through rumination,such that this mediating effect was only significant for one with dispositional optimism at the low level.