In both an original and a replication study, groups of threatened, attempted, and those who sometimes threatened and sometimes attempted suicide could be differentiated from neuropsychiatric nonsuicidal Ss by means of an MMPI item analysis. The three types of suicidal groups could not be distinguished from each other. An analysis of the differentiating items showed the existence of various patterns. Some items were common to all suicidal groups, some to the threat and attempt groups, some to the attempt and threat/attempt groups, and some to the threat and threat/attempt groups. No items were found to differentiate only one type of suicidal group.
