Three important psychological dimensions in the suicide literature (neuroticism, self-criticism, and hopelessness) were examined in relation to suicidal ideation and attempts in the U.S. National Comorbidity Survey (Kessler et al., 1994; n = 5,877), after first controlling for the effects of previously identified sociodemographic and psychiatric variables related to suicidality in this nationally representative sample (Kessler, Borges, & Walters, 1999). Analyses were conducted separately for lifetime, current (12-month), and past history of suicidal ideation and attempts. Brief indices of self-criticism and hopelessness were robustly associated with suicide attempts across all three time frames. The results support the value of examining psychological individual differences over sociodemographic and psychiatric diagnoses alone in the comprehensive assessment of factors associated with suicidality in the general population.