The hopelessness theory of depression: a test of the diathesis-stress and causal mediation components in third and seventh grade children.

The goal of the current study was to test the diathesis-stress and causal mediation components of the hopelessness theory of depression in third- and seventh-grade children. The procedure involved an initial assessment of depressive symptoms, hopelessness, and the 3 cognitive styles posited as vulnerability factors by hopelessness theory. The procedure also involved a series of 6 weekly follow-up assessments in which depressive symptoms, hopelessness, and the occurrence of negative events were assessed. A depressogenic attributional style interacted with negative events to predict increases in depressive symptoms in seventh-grade children but not in third-grade children. A depressogenic inferential style about consequences interacted with negative events to predict increases in depressive symptoms in both third- and seventh-grade children. Last, a depressogenic inferential style about the self interacted with negative events to predict increases in depressive symptoms in third- and seventh-grade girls but not boys. None of these interactions were mediated by hopelessness.