In recent years, rumination has been used in the etiology of depression and hopelessness as two proximal predictors of suicide ideation and behavior. But findings have been inconsistent with respect to the role of rumination subtypes in the prediction of suicidal ideation and it was supposed that reflection (focusing on the causes of depressed mood) was a more adaptive form than the brooding (focusing on the results of depressed mood). The present study, in the context of Ruminative Response style theory of depression, aimed at examining the role of rumination and its subtypes along with depression and hopelessness in the prediction of suicidal ideation. To this end, 177 undergraduate students with scores of 10 or higher in BDI-II were asked to complete rumination and hopelessness scales and questions about suicide ideation. Using logistic regression technique, it was shown that this model could predict 59.3% of the likelihood of the presence of suicidal ideation. This study was in line with earlier studies which have presumed reflection as the more adaptive subtype. Results also suggested that there was a greater correlation between rumination, its subtypes and suicidal ideation in females. This study also emphasizes the use of interventions targeting rumination in order to prevent suicidal ideations.
