NEO-five factor personality traits as predictors of response to two forms of group psychotherapy.

The relationships between patient personality variables and outcome for 107 psychiatric outpatients with complicated grief who completed either interpretive or supportive short-term group therapy were investigated. The personality variables were assessed prior to treatment with the NEO-Five Factor Inventory (NEO-FFI). For patients in both forms of therapy, extraversion, conscientiousness, and openness were directly associated with favorable treatment outcome. In contrast, neuroticism was inversely related to favorable outcome for patients in both forms of therapy. Agreeableness was directly related to favorable improvement in grief symptomatology for patients in interpretive therapy, but not for those in supportive therapy. The results highlight the importance of assessing patient personality in order to predict response to short-term group therapy. Possible explanations and clinical implications of these findings are discussed.