Background and Objectives: As regards that suicidal ideation is a common problem in people with obsessive- compulsive tendencies, studying its components is of particular important. The aim of the present study was to investigate suicidal ideation based on perfectionism and positive and negative effects in people with obsessive tendencies.

Material and Methods: In a descriptive-correlational and cross-sectional research approach, 470 students from Tabriz University were selected using multistage random cluster sampling. From this sample, 163 people with an obsession score higher than the cut-off point were chosen and labeled as people with obsessive tendencies. In order to collect the data, Maudsley Obsessive-Compulsive Inventory, Five Facet Mindfulness Questionnaire, Responsivility Attitude Scale, and Beck Scale for Suicide Ideation were used. The data were analyzed using Pearson product-moment correlation and simultaneous multiple regression by SPSS v.21 software.

Results: The correlation results showed that, among the components of mindfulness; observation components (r=0.15; p<0.05) and consciousness-based act (r=-0.87; p<0.01), non-judgment (r=0.86; p<0.01), and the lack of response to internal experience (r=0.69; p<0.01) had significant inverse correlation with suicidal thoughts. Among the components of mindfulness, the components of consciousness-based act and non-judgment with the regression coefficients (β= -0.33; β= -0.45) respectively, were able to predict suicidal thoughts among research units (p<0.01). Also, responsibility variable with the regression coefficient (β=0.35) was able to predict suicidal thoughts (p<0.01).

Conclusion: Based on these findings, it can be concluded that components, of consciousness-based act, non-judgment, and responsibility were the main determinants of suicidal ideation in people with obsessive tendencies.