Ruminative Inertia, Emotion Regulation, and Depression: A Daily-Diary Study.

Emotional suppression and cognitive reappraisal are emotion regulation strategies that have been linked to the severity of depression. Recent research has shown that greater ruminative inertia (i.e., rumination that is more resistant to change across time) is also associated with higher levels of depressive symptoms in clinical samples. However, it is unknown how tendencies to use suppression or reappraisal might be related to the inertia of rumination from day to day. After completing a baseline assessment of depressive symptoms and trait emotional suppression and cognitive reappraisal use, undergraduates (n = 94) completed daily-diary questionnaires assessing rumination for two weeks. Both higher depressive symptoms and greater tendencies to use suppression predicted stronger ruminative inertia, while tendencies to use reappraisal were unrelated to ruminative inertia. These results suggest that maladaptive emotion regulation strategies may contribute to a pattern of rumination that is more resistant to change over time. They also provide the first evidence that ruminative inertia is positively associated with depressive symptoms in a nonclinical sample.