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The ontogeny of auditory frequency generalization in the chicken.

E W Rubel, M H Rosenthal

    Journal of Experimental Psychology. Animal Behavior Processes
    |October 1, 1975
    PubMed
    Summary
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    Young chickens show developing auditory perception. One-day-old chicks have broader stimulus generalization, indicating less refined perceptual coding compared to older chicks.

    Area of Science:

    • Developmental Psychology
    • Neuroscience
    • Animal Behavior

    Background:

    • Understanding ontogenetic changes in sensory processing is crucial for developmental studies.
    • Auditory stimulus coding in young animals can be influenced by developmental stage.
    • Habituation-generalization paradigms are effective for assessing perceptual discrimination.

    Purpose of the Study:

    • To investigate ontogenetic changes in auditory stimulus coding in young chickens.
    • To determine if perceptual coding sharpens during early development.
    • To analyze stimulus generalization gradients across different ages.

    Main Methods:

    • A habituation-generalization paradigm was employed with chickens aged 1 to 9-10 days old.
    • The eye-opening response to auditory stimuli (800-1,200 Hz) was habituated.

    Related Experiment Videos

  • Stimulus generalization gradients were measured across different age groups.

    • Main Results:

    • One-day-old and 3-4-day-old chicks exhibited similar habituation to auditory stimuli.
    • All age groups showed symmetrical stimulus generalization gradients.
    • One-day-old chicks displayed a reliably flatter generalization gradient than older groups.

    Conclusions:

    • Age-related differences in stimulus generalization gradients suggest developmental changes in perceptual coding.
    • The findings support the hypothesis that perceptual coding processes sharpen during early development in chickens.
    • General arousal or responsiveness are unlikely explanations for the observed age differences.