Self-other representations mediate the relationship between Five-Factor Model depression and depressive states.

While it is well established that trait depression is a risk factor for experiencing increased rates of episodes of depression, it is also the case that the ways in which the self and others are perceived, and nature of the relationship between self and other, predispose individuals to frequent depressive episodes. In this study, 182 psychiatric outpatients at three treatment facilities were evaluated for Five-Factor Model depressive traits, depressive states, and self-other representations (object relations). It was hypothesized that object relations would mediate the relationship between trait and state depression. Results partially confirmed this hypothesis. While trait depression significantly predicted variance in the Beck Depression Inventory-II (BDI-II; Beck et al., 1988), two dimensions of the Bell Object Relations and Reality Testing Inventory (BORRTI; Bell, 1995)--Alienation and Insecure Attachment--partially mediated the relationship between trait and state depression. Similarly, trait depression predicted tendencies to experience frequent shifts toward depressive episodes, although the Insecure Attachment and Egocentricity scales of the BORRTI fully mediated the relationship between trait depression and depressive lability. Knowledge of self-other representations, which is being considered for inclusion in the DSM-5, allows for a more refined understanding of those factors that contribute shifts in depressive mood.