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Related Experiment Videos

Shock intensity and signaled avoidance responding.

D Das Graças De Souza, A B Alves De Moraes, J C Todorov

    Journal of the Experimental Analysis of Behavior
    |July 1, 1984
    PubMed
    Summary
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    Shock intensity has an all-or-none effect on avoidance learning in rats. A minimum shock level is needed to establish avoidance responding, with higher intensities showing little additional impact on behavior.

    Area of Science:

    • Behavioral neuroscience
    • Animal behavior

    Background:

    • Operant conditioning involves learning through consequences.
    • Avoidance behavior is crucial for survival, allowing organisms to escape aversive stimuli.

    Purpose of the Study:

    • To investigate the effect of varying shock intensity on signaled free-operant avoidance responding in rats.
    • To determine if shock intensity influences stimulus control in avoidance learning.

    Main Methods:

    • Five rats were subjected to a signaled free-operant avoidance task.
    • Shock intensity was systematically manipulated (0.1–8.0 mA) while duration remained constant (200 ms).
    • Response rates, shock rates, and stimulus control were measured.

    Main Results:

    Related Experiment Videos

  • An all-or-none effect was observed regarding shock intensity's influence on response and shock rates.
  • Shock intensity did not systematically affect stimulus control, measured by response occurrence during the warning stimulus.
  • A minimum shock intensity was necessary to establish and maintain avoidance responding.

    • Conclusions:

    • Avoidance responding in rats is established at a minimum effective shock intensity.
    • Beyond this threshold, increasing shock intensity has minimal impact on avoidance behavior, up to a point where it may disrupt overall activity.