In 4 experiments, 144 depressed and 144 nondepressed undergraduates (Beck Depression Inventory) were presented with one of a series of problems varying in the degree of contingency. In each problem, Ss estimated the degree of contingency between their responses (pressing or not pressing a button) and an environmental outcome (onset of a green light). Depressed Ss’ judgments of contingency were suprisingly accurate in all 4 experiments. Nondepressed Ss overestimated the degree of contingency between their responses and outcomes when noncontingent outcomes were frequent and/or desired and underestimated the degree of contingency when contingent outcomes were undesired. Thus, predictions derived from social psychology concerning the linkage between subjective and objective contingencies were confirmed for nondepressed but not for depressed Ss. The learned helplessness and self-serving motivational bias hypotheses are evaluated as explanations of the results.