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Fatigue, depression, and cognitive performance among aged persons.

B Hayslip¹, K J Kennelly, R M Maloy

¹Department of Psychology, University of North Texas, Denton 76203.

Experimental Aging Research

|January 1, 1990

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Depression increases fatigue susceptibility in older adults, particularly impacting short-term memory performance. Cognitive assessments should account for these factors in the aged population.

Area of Science:

Gerontology
Cognitive Psychology
Psychiatry

Background:

Fatigue and depression are known to impair cognitive performance in older adults.
Previous research indicates a potential link between depression, fatigue, and cognitive assessment challenges in the elderly.

Purpose of the Study:

To investigate the influence of depression and task effort on fatigue and cognitive performance in older individuals.
To determine how fatigue and depression affect different cognitive domains, specifically memory and intelligence.

Main Methods:

Data collected from 72 older adults screened for depression.
Participants assigned to one of three conditions varying in task effort and fatigue induction.
Cognitive performance assessed using measures of active and passive short-term memory and intelligence.

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Main Results:

Depressed older adults demonstrated a higher proneness to fatigue.
Both depression and task effort significantly impacted short-term memory performance (active and passive).
The effects of depression and task effort on intelligence measures were substantially weaker.

Conclusions:

Depression exacerbates fatigue in older adults, negatively affecting short-term memory.
Cognitive assessment of older individuals, especially those with depression, must consider fatigue and effort levels.
Intelligence appears more resilient to the combined effects of depression and fatigue compared to short-term memory.