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The development of a human auditory localization response: a U-shaped function.

D W Muir, R K Clifton, M G Clarkson

    Canadian Journal of Psychology
    |June 1, 1989
    PubMed
    Summary
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    Infant head-turning responses to sound show a U-shaped developmental curve, declining in early months before improving. This pattern suggests a shift from subcortical to cortical control in auditory processing.

    Area of Science:

    • Auditory development in infants
    • Neonatal auditory perception
    • Developmental psychology

    Background:

    • The neonatal head-turn response is a key indicator of auditory processing.
    • Previous research has explored factors influencing this response.
    • Understanding developmental changes in auditory orientation is crucial.

    Purpose of the Study:

    • To review research on neonatal head-turn responses to sound over the past decade.
    • To identify conditions affecting correct head-turn responses.
    • To confirm and investigate the U-shaped developmental function in auditory orientation.

    Main Methods:

    • A cross-sectional study of 104 infants aged 3 days to 7 months.
    • Analysis of head-turn responses to off-centered rattle sounds.

    Related Experiment Videos

  • Introduction of the presence effect (PE) using delayed auditory stimuli to assess cortical function.

    • Main Results:

    • A U-shaped developmental function was confirmed: responses were reliable but slow in neonates, decreased between 1-3 months, and increased by 4-5 months.
    • Neonates did not respond to the presence effect (PE), indicating immature cortical processing.
    • The emergence of correct PE responses correlated with the recovery phase of the U-shaped function.

    Conclusions:

    • The U-shaped developmental function in head-turn responses suggests a maturational shift from subcortical to cortical control of auditory attention.
    • The presence effect (PE) provides evidence for the role of cortical structures in auditory perception development.
    • Further research is needed to explore alternative explanations for the temporary decline in auditory orientation responses.