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Echoic storage in infant perception

N Cowan, K Suomi, P A Morse

    Child Development
    |August 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Infants

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    Area of Science:

    • Cognitive Psychology
    • Developmental Psychology
    • Auditory Perception

    Background:

    • Echoic memory, a brief auditory sensory store, is crucial for processing speech and sound.
    • Understanding echoic storage in infants is vital for developmental insights into auditory perception.

    Purpose of the Study:

    • To investigate preperceptual auditory echoic storage in 8-9 week-old infants.
    • To compare infant echoic memory capabilities with adult models using modified masking paradigms.

    Main Methods:

    • Utilized a nonnutritive sucking discrimination procedure adapted for infant auditory studies.
    • Employed backward and forward masking paradigms with varying stimulus onset asynchronies (SOAs).
    • Tested discrimination of brief vowel changes under different masking conditions.

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    Main Results:

    • Infants could discriminate vowel changes in forward masking but not backward masking at a 50 msec SOA.
    • Discrimination was successful in backward masking with a 400 msec SOA, but not at 250 msec.
    • Results indicate echoic storage is functional in early infancy.

    Conclusions:

    • Echoic storage significantly contributes to auditory perception in infants, similar to adults.
    • The temporal duration of echoic traces may be extended in infancy compared to adulthood.