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Related Experiment Videos

Contingency contrast effects in discrimination conditioning.

W W Grings, M C Givens, C A Carey

    Journal of Experimental Psychology. General
    |September 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

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    Psychophysiology·1980

    Electrodermal responding to random signals (CSR) was investigated. Results suggest CSR acts as a mildly excitatory signal, influenced by contingency contrast effects and environmental factors.

    Area of Science:

    • Psychology
    • Neuroscience
    • Behavioral Science

    Background:

    • Electrodermal responding (EDR) is a key indicator of autonomic arousal.
    • Understanding how conditioned stimuli (CSs) elicit EDR is crucial for learning theories.
    • Previous research suggested EDR to random signals (CSR) might be intermediate between excitatory (CS+) and inhibitory (CS-) signals.

    Purpose of the Study:

    • To investigate electrodermal responding to conditioned stimuli (CSs) under varying contingency conditions.
    • To test if electrodermal response to a random signal (CSR) is intermediate between excitatory (CS+) and inhibitory (CS-) signals.
    • To explore the phenomenon of contingency contrast in autonomic learning.

    Main Methods:

    • Three experiments utilized differential electrodermal responding to signal stimuli (CSs).

    Related Experiment Videos

  • Contingencies between signals (CSs) and unconditioned stimuli (UCSs) were manipulated (positive, random, negative).
  • Stimulus pairings included CS+/CS-, CS+/CSR, and CSR/CS- to assess differential responding.

    • Main Results:

    • Electrodermal response to CSR was not intermediate but mildly excitatory.
    • Differential responding was observed across all CS pairings.
    • CSR response was significantly higher when paired with CS- compared to CS+, suggesting a contingency contrast effect.
    • UCS density and instructions influenced differential performance, supporting a perceptual contingency-contrast effect.

    Conclusions:

    • The findings challenge the intermediate position hypothesis for CSR.
    • A contingency contrast effect significantly influences electrodermal responding.
    • Conditioned stimuli (CSs) provide contingency information modulated by environmental context and learning history.