Abstract
Abstract : Tests of two key hypotheses of the Interpersonal-Psychological Theory of Suicidal Behaviour (IPTS) were conducted in a cross-sectional sample of 239 psychiatric outpatients. Results of regression analyses indicated that thwarted belongingness (TB) and perceived burdensomeness (PB) were independently associated with death ideation, with some degree of death ideation being reported by all participants who obtained higher than mean scores on measures of PB and TB. After controlling for demographic covariates and depressive symptoms, the main effects of TB, PB, hopelessness, and all two-way interactions, suicide ideation was significantly predicted by the interactive effects of high levels of: TB, PB, and hopelessness. The findings are discussed in terms of their implications for future research on the theory and the clinical context.