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Related Experiment Videos

Delayed stimulus control: recall for single and relational stimuli

K G White, J McKenzie

    Journal of the Experimental Analysis of Behavior
    |November 1, 1982
    PubMed
    Summary

    Pigeons

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    Area of Science:

    • Animal cognition
    • Behavioral neuroscience
    • Comparative psychology

    Background:

    • Symbolic matching-to-sample tasks are used to study memory in animals.
    • Recallability is a key aspect of memory that can be measured by response patterns.

    Purpose of the Study:

    • To investigate how discrimination difficulty affects memory recall in pigeons.
    • To compare recallability in relational versus single discriminations.
    • To examine the influence of stimulus complexity on memory performance.

    Main Methods:

    • Pigeons were trained on a discrete-trial symbolic matching-to-sample procedure.
    • Recallability was assessed by analyzing response ratios after varying delays.
    • Experiments manipulated discrimination type (relational vs. single) and difficulty.

    Main Results:

    • Relational discriminations showed lower initial performance than single discriminations, indicating greater difficulty.
    • Both relational and single discriminations exhibited similar rates of recall decrement over time.
    • Easier and more difficult individual wavelength discriminations differed in initial performance but not in recall decay rate.

    Conclusions:

    • Discrimination difficulty, rather than the relational aspect itself, primarily influences initial memory performance.
    • Stimulus complexity affects the difficulty of a discrimination, which in turn impacts initial recall levels.
    • Memory recall decay rates appear consistent across different discrimination complexities and types.

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