Everyday false memories in older persons with depressive disorder

Area of Science:

• Cognitive psychology
• Neuroscience
• Clinical psychology

Background:

• Everyday memory is often assumed to be accurate in healthy individuals.
• Memory research increasingly reveals subtle memory faults, including omissions and distortions.
• Investigating these memory inaccuracies in daily life contexts is crucial.

Purpose of the Study:

• To compare everyday memory accuracy between healthy older adults and patients with depressive disorder.
• To examine the role of executive functions and mood in memory distortions.
• To understand how false memories impact overall memory accuracy in older adults with depression.

Main Methods:

• Utilized a comprehensive neuropsychological test battery to assess cognitive function.
• Administered the Montgomery-Asberg Depression Scale (MADRS) to evaluate mood.
• Assessed everyday veridical and distorted memories using news and commercials stimuli.

Main Results:

• Patients with depressive disorder (DD) exhibited poorer performance in attention, executive functions, and memory compared to healthy controls (HC).
• The difference between DD patients and HC was more significant for false memory content than for veridical memory content.
• False memory content correlated with mental flexibility (Trail Making Test) and mood (MADRS).

Conclusions:

• Increased false memories more significantly impair memory accuracy than decreased veridical memories in older adults with DD.
• Diminished executive functions and depressive mood partially explain memory distortions in this population.
• Findings highlight the substantial impact of depressive disorder on the fidelity of everyday memory in older adults.