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Effort and cognition in depression

R M Cohen, H Weingartner, S A Smallberg

    Archives of General Psychiatry
    |May 1, 1982
    PubMed
    Summary
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    Depression severity correlates with poorer motor and memory task performance. This impairment is most pronounced in tasks demanding sustained effort, suggesting a motivational deficit in depressed individuals.

    Area of Science:

    • Neuroscience
    • Psychiatry
    • Cognitive Psychology

    Background:

    • Depression is a prevalent mood disorder.
    • Cognitive and motor impairments are common in depression.
    • The impact of depression severity on specific task types is not fully understood.

    Purpose of the Study:

    • To investigate the relationship between depression severity and performance on motor and cognitive tasks.
    • To identify specific task characteristics that exacerbate depression-related deficits.

    Main Methods:

    • Comparison of motor and cognitive task performance between depressed patients and healthy controls.
    • Correlation analysis between depression severity and performance decrements.
    • Analysis of performance across tasks varying in required effort.

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    Main Results:

    • Increasing depression severity was significantly associated with reduced performance in both motor and memory tasks.
    • Tasks requiring sustained effort showed the greatest impairment related to depression.
    • A dose-response relationship was observed between depression severity and performance deficits.

    Conclusions:

    • Depression is linked to widespread deficits in motor and cognitive function.
    • Sustained effort tasks are particularly vulnerable to depression-related impairments.
    • Findings suggest a generalized deficit in the central motivational state of depressed individuals.