The Properties of Involuntary and Voluntary Autobiographical Memories in Chinese Patients with Depression and Healthy Individuals

Background Research on depression has largely focused on negative intrusive memories with little research on general involuntary memories as they occur in everyday life. In addition, all studies have been conducted on Western participants, and there are no studies on general involuntary memory in Eastern patients with depression. Methods Thirty Chinese patients with depression and 30 healthy controls completed a memory diary in which they recorded a total of 10 involuntary and 10 voluntary memories. They were requested to fill out corresponding questionnaires of involuntary and voluntary memories as well. Results Both patients with depression and healthy controls reported involuntary memories that had a more negative impact, were more specific, and were associated with more maladaptive emotion regulation when compared to voluntary memories. For both retrieval modes, patients with depression reported more negative and fewer positive memories, more negative and less positive mood impact, more avoidance, rumination, worry, negative interpretation, and less positive interpretation in response to the memories. Patients with depression rated their memories as more central, less specific, and rehearsed more frequently. Negative mood impact and maladaptive emotion regulation associated with involuntary memories were amplified in depression. Conclusions These findings support the view that general involuntary memories could be a potential target to promote the treatment for depression.