For people with depressed mood, memory and concentration difficulties are often a day-to-day reality, greatly affecting job performance and personal relationships. While those with the disorder report that these cognitive problems are some of the most deeply troubling, previous studies have been unable to observe this phenomenon in a laboratory setting. In a study published online today in Cognition and Emotion, researchers at the Center for BrainHealth at The University of Texas at Dallas are the first to substantiate memory deficits in individuals with depressed mood. The findings may have implications for the way cognitive deficits are diagnosed and treated in depression.
In the study, individuals with depressed mood show as much as a 12% reduction in memory compared to individuals without depressed mood when depressive thoughts are present, but perform similarly to individuals without depressed mood when depressive thoughts are not present. "The results suggest that individuals with and without depressed mood generally have a similar ability to actively remember information. However, when depressive thoughts are present, people with depressed mood are unable to remove their attention from this information, leading to deficits in their memory," explained Nicholas Hubbard, the study's lead author and a doctoral candidate at the Center for BrainHealth under Bart Rypma, Ph.D.
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