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An auditory psychometric function from newborn chicks.

L Gray1

  • 1Department of Otolaryngology-Head and Neck Surgery, University of Texas Medical School, Houston 77030.

The Journal of the Acoustical Society of America
|March 1, 1992
PubMed
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This study quantifies newborn chick hearing using receiver operating characteristics (ROCs). Chicks show developing auditory abilities, with thresholds improving at low frequencies first, but never reaching adult performance levels.

Area of Science:

  • Auditory Neuroscience
  • Animal Behavior
  • Psychoacoustics

Background:

  • Quantifying auditory perception in neonates is crucial for understanding auditory development.
  • Receiver Operating Characteristics (ROCs) offer a robust method for assessing auditory sensitivity.
  • Previous research indicates developmental differences in auditory thresholds.

Purpose of the Study:

  • To quantify the auditory sensitivity of newborn chicks using ROCs.
  • To construct a detailed auditory psychometric function for neonatal hearing.
  • To investigate the effects of age, frequency, and intensity on auditory performance.

Main Methods:

  • Analysis of over 20,000 vocalization delays from 160 newborn chicks.
  • Stimulation with pulsing pure tones across four frequencies (0.25-2 kHz) and eight intensities.

Related Experiment Videos

  • Calculation of areas under ROC curves to determine auditory psychometric functions.

    • Main Results:

    • Areas under ROCs demonstrated an S-shaped function with increasing intensity.
    • Maximum chick responsiveness reached approximately 75% correct, indicating immature auditory performance.
    • Auditory thresholds were best estimated at 65% correct performance.
    • Thresholds matured earlier at low frequencies compared to high frequencies.
    • Habituation effects decreased responsiveness, but varied frequencies improved performance in younger chicks.

    Conclusions:

    • ROCs provide a reliable method for quantifying neonatal auditory perception.
    • Chick auditory systems show developmental maturation, with low frequencies developing earlier.
    • Neonatal auditory performance is characterized by developing sensitivity and susceptibility to habituation.