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Related Experiment Videos

Teaching serial position sequences to monkeys with a delayed matching-to-sample procedure.

H A Mackay, S M Brown

    Journal of the Experimental Analysis of Behavior
    |May 1, 1971
    PubMed
    Summary

    A fading technique effectively trained monkeys to recall key sequences. A no-fading method led to persistent errors, suggesting reinforcement of incorrect behaviors.

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    Area of Science:

    • * Behavioral science
    • * Animal cognition
    • * Learning and memory

    Background:

    • * Training animals to recall sequences is crucial for understanding cognitive processes.
    • * Previous methods relied on consistent visual cues, which may hinder generalization.

    Purpose of the Study:

    • * To compare the efficacy of a fading technique versus a no-fading procedure in training serial position sequence recall in monkeys.
    • * To investigate the behavioral patterns, including errors, that emerge from different training protocols.

    Main Methods:

    • * Monkeys were trained to observe a two-key sequence using lighted keys.
    • * Two groups were trained: one using a fading technique (gradual cue elimination) and another with a no-fading procedure (sudden cue removal).
    • * Performance was assessed by the monkeys' ability to report the sequence without lights.

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    Main Results:

    • * The fading technique was significantly more effective for training sequence recall.
    • * Monkeys in the no-fading group exhibited persistent, specific errors, prematurely terminating trials.
    • * These errors were linked to reinforcement schedules, where incorrect responses were sometimes followed by reinforcement on other sequences.

    Conclusions:

    • * Gradual cue elimination (fading) is a superior method for teaching monkeys to generalize sequence recall.
    • * Sudden removal of cues can lead to maladaptive learning and stereotyped error patterns.
    • * Contingency manipulation is key to understanding and preventing persistent errors in animal training.