Codetype base rates for the "I Mean Business" suicide items on the MMPI-2.

This study focused on the frequency with which two MMPI-2 suicide items (506 and 520) were endorsed. These two items can be referred to as the "I Mean Business" items, for there is no denying that the client is reporting the recent contemplation of actively taking his or her life. A large sample (N = 23,646) of well-defined MMPI-2 codetypes was examined from the Caldwell (1997) data set. The frequencies with which individuals within a particular codetype endorsed Item 506, Item 520, or both are provided by gender. Results provide information that is consistent with the clinical lore concerning suicidal ideation/intent and codetypes. Unexpected findings are also noted. The implications of these base rates in psychotherapy are discussed from clinical and risk management perspectives.

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