The present study addressed the possible relationships between nonassertion, dysfunctional attitudes, and mild levels of depression. Participants in this study completed two self-report measures of assertion (the Conflict Resolution Scale and the Assertion Inventory), along with the Beck Depression Inventory and the Dysfunctional Attitudes Scale (DAS). In accord with past research, it was found that assertion deficits increased significantly with increases in depression scores. Of special interest was the finding that the presence of dysfunctional attitudes also accounted for a significant increase in assertion difficulties, over and above that accounted for by depression. In particular, individuals scoring high on the DAS indicated greater difficulty in the resolution of interpersonal conflicts and the comfortable assertion of their own rights, compared to individuals scoring low on this measure. These findings were discussed in terms of the disruptive effects of dysfunctional attitudes on assertive responding, and their possible relationship to a cognitive vulnerability model of depression.