The purpose of present study is to examine the moderating effect of happiness on the relation between mental disorders and suicidal behavior. The participants were 1165 college students (652 males, 513 females) in Seoul. They were administered the Korean Mental Disorder Inventory (K-MDI), the Suicidal Behavior Questionnaire-Revised (SBQ-R), and the Concise Measure of Subjective Well-Being (COMOSWB). The results showed significant moderating effects of happiness on the relation between mental disorders and suicidal behavior. In particular, the effects of happiness enhancement on reducing the possibility of suicidal behavior were greater for the group with mental disorders than the group without mental disorders. Based on these findings, it was suggested that, even for those with more severe mental disorders, suicide prevention programs should include the efforts to enhance happiness as well as therapeutic intervention aimed at reduction of mental illnesses.
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