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Related Experiment Videos

Differential reinforcement and signal detection.

J A Nevin, K Olson, C Mandell

    Journal of the Experimental Analysis of Behavior
    |November 1, 1975
    PubMed
    Summary

    Reinforcement for errors in signal detection tasks can alter response biases. Contrary to theory, sensitivity estimates are not always invariant but depend on reinforcement schedules.

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    Area of Science:

    • Behavioral neuroscience
    • Cognitive psychology
    • Signal detection theory

    Background:

    • Signal detection theory (SDT) assumes sensitivity is independent of response reinforcement.
    • Previous research indicates response biases are affected by reinforcement schedules.

    Purpose of the Study:

    • To investigate the invariance of sensitivity estimates under different reinforcement conditions in signal detection tasks.
    • To examine how reinforcement for errors impacts sensitivity and response biases in rats and pigeons.

    Main Methods:

    • Utilized discrete-trial and continuous procedures with varying reinforcement schedules for correct responses and errors.
    • Employed signal detection tasks with visual signals in rats and pigeons.
    • Manipulated reinforcement probabilities and physical differences between signals.

    Main Results:

    • Rats adjusted response biases with varying reinforcement probabilities, maintaining sensitivity.
    • Sensitivity decreased when reinforcement was scheduled for errors, irrespective of overall reinforcers.
    • This decrease in sensitivity was consistent across different procedures and species (rats and pigeons).

    Conclusions:

    • Estimates of sensitivity in signal detection are not invariant to reinforcement outcomes.
    • Reinforcement of errors can significantly impair signal detection sensitivity, challenging a core assumption of SDT.
    • Findings highlight the crucial role of reinforcement history in shaping performance in detection tasks.

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