This research examined an integration of cognitive and interpersonal theories of depression by investigating the prospective contribution of depressive rumination to perceptions of social support, the generation of interpersonal stress, and depressive symptoms. It was hypothesized that depressive ruminators would generate stress in their relationships, and that social support discontent would account for this association. Further, depressive rumination and dependent interpersonal stress were examined as joint and unique predictors of depressive symptoms over time. Participants included 122 undergraduate students (M age = 19.78 years, SD = 3.54) who completed assessments of depressive rumination, perceptions of social support, life stress, and depressive symptoms across three waves, each spaced 9 months apart. Results revealed that social support discontent accounted for the prospective association between depressive rumination and dependent interpersonal stress, and that both depressive rumination and dependent interpersonal stress contributed to elevations in depressive symptoms over time. These findings highlight the complex interplay between cognitive and interpersonal processes that confer vulnerability to depression, and have implications for the development of integrated depression-focused intervention endeavors.
Keywords: Depression; Interpersonal stress; Rumination; Social support.