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Developmental changes in auditory temporal perception.

B A Morrongiello, J W Kulig, R K Clifton

    Child Development
    |April 1, 1984
    PubMed
    Summary

    Young children and adults perceive auditory precedence differently. This study reveals that infants and preschoolers require longer sound delays to recognize the precedence effect compared to adults.

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    Area of Science:

    • Auditory Perception
    • Developmental Psychology
    • Acoustics

    Background:

    • The precedence effect is an auditory phenomenon where the perceived location of a sound is dominated by the first arriving signal.
    • This effect is crucial for sound localization and understanding complex auditory environments.
    • Understanding the developmental trajectory of the precedence effect is key to comprehending auditory development in children.

    Purpose of the Study:

    • To investigate the developmental differences in the precedence effect across infants, preschoolers, and adults.
    • To determine the auditory threshold for the precedence effect in different age groups.
    • To explore how sound complexity influences the precedence effect in younger listeners.

    Main Methods:

    • Participants (infants, preschoolers, adults) were tested on their ability to perceive the precedence effect.
    • Thresholds were determined using ascending/descending series and method of constant stimuli for older participants.
    • Infants were trained using a visually reinforced head-turning procedure to assess their response to delayed sounds.

    Main Results:

    • Adults and preschoolers had similar thresholds for clicks (around 12 msec).
    • Six-month-old infants showed a threshold around 25 msec, indicating a longer delay is needed to perceive the effect.
    • A developmental difference was observed for complex sounds, with younger subjects requiring longer delays.

    Conclusions:

    • Auditory processing of the precedence effect shows significant developmental changes from infancy through adulthood.
    • Younger individuals, particularly infants, require longer inter-stimulus intervals to experience the precedence effect compared to adults.
    • These findings highlight the maturation of auditory localization mechanisms throughout early development.

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