Joiner's interpersonal-psychological theory of suicide (IPTS) is predated by literature examining maladaptive interpersonal behaviors associated with depression; however, research has not examined the potential relevance of such behaviors for the IPTS. The current study aimed to expand understanding of suicide risk by examining two maladaptive interpersonal behaviors in the context of Joiner's IPTS model. Structural equation modeling examined associations between depressive symptoms, social-cognitive predictors of suicide, maladaptive interpersonal behaviors, and suicide risk in 228 college students (53.9% female; M = 19.5 years, SD = 1.8). Social-cognitive IPTS variables mediated the relation between depressive symptoms and maladaptive interpersonal behavior. Both social-cognition and maladaptive interpersonal behavior mediated the effect of depressive symptoms on suicide risk. Findings have the potential to add to our understanding of the interplay of social-cognitive factors and interpersonal behaviors associated with suicide risk. Directions for future research are discussed.
Keywords: college students; depression; interpersonal theories; risk factors; suicide.