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Learned helplessness in the rat.

M E Seligman, G Beagley

    Journal of Comparative and Physiological Psychology
    |February 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Rats exposed to inescapable shock exhibit learned helplessness, failing to escape even when escape becomes possible. This parallels learned helplessness behavior observed in dogs, demonstrating a consistent cross-species phenomenon.

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    Area of Science:

    • Behavioral Neuroscience
    • Animal Psychology

    Background:

    • Learned helplessness is a psychological state where an organism fails to escape aversive stimuli after repeated exposure to uncontrollable situations.
    • Previous research has primarily focused on learned helplessness in dogs.

    Purpose of the Study:

    • To investigate if learned helplessness can be induced in rats using a similar experimental paradigm as used in dogs.
    • To examine the behavioral parallels of learned helplessness in rats.

    Main Methods:

    • Four experiments were conducted involving rats exposed to escapable, inescapable, or no shock.
    • Subsequent testing involved escape responses such as jump-up and bar pressing at different fixed ratios (FR).
    • Yoked-control designs were employed to differentiate the effects of inescapable shock from shock per se.

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    Main Results:

    • Rats exposed to inescapable shock failed to escape in subsequent jump-up tests, similar to no-shock controls in some conditions.
    • Bar pressing escape at a fixed ratio (FR) 3 was impaired by prior inescapable shock, but not at lower ratios.
    • Prior learning of an escape response prevented helplessness, while yoked-control rats receiving inescapable shock did become passive.

    Conclusions:

    • Rats exhibit learned helplessness, failing to escape shock as a function of prior inescapable shock exposure.
    • The findings demonstrate that learned helplessness is a phenomenon observable in rats, paralleling observations in dogs.
    • The results underscore that the uncontrollability of the shock, not the shock itself, is the critical factor in inducing learned helplessness.