Cognitive processes in hoarding: The role of rumination

•We examined the relationship between rumination and hoarding.•Rumination was associated with hoarding even after controlling for depression.•Findings support rumination as a transdiagnostic risk factor.•Findings add to a growing body of literature identifying risk factors for hoarding disorder.

Rumination, defined as an individual's repetitive negative cognitions of upsetting symptoms in response to distress, has been established as an important cognitive vulnerability factor within various forms of psychopathology. Despite compelling data to suggest that rumination is associated with a number of mood and anxiety-related conditions, no research to date has examined the relationship between rumination and hoarding. Participants consisted of 275 undergraduate students as well as 106 individuals recruited from the community to participate in a larger randomized clinical trial investigating the effects of a computerized treatment targeting specific risk factors associated with anxiety and suicide. Consistent with initial prediction, results indicated that rumination was a significant predictor of hoarding severity, even after controlling for overall general levels of depression. These findings add to a growing body of literature identifying various cognitive vulnerability factors important for the development and maintenance of hoarding. Increasing our knowledge of cognitive vulnerability factors has import implications for the prevention and treatment of anxiety disorders.