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Pediatric speech intelligibility test: performance-intensity characteristics

S Jerger, J Jerger

    Ear and Hearing
    |November 1, 1982
    PubMed
    Summary
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    This study examined speech intelligibility in children using the Pediatric Speech Intelligibility (PSI) test. Results show age impacts speech recognition thresholds, crucial for understanding auditory development in children.

    Area of Science:

    • Audiology
    • Developmental Psychology
    • Speech-Language Pathology

    Background:

    • Understanding speech perception in children is vital for identifying hearing impairments and developmental delays.
    • Performance-intensity functions (PI) are key to assessing how hearing ability changes with sound level.
    • Pediatric Speech Intelligibility (PSI) test materials provide a standardized method for evaluating speech understanding in young children.

    Purpose of the Study:

    • To characterize the performance-intensity (PI) functions for Pediatric Speech Intelligibility (PSI) test materials in normal-hearing children aged 3-6 years.
    • To investigate the influence of chronological age on speech intelligibility measures, including function steepness and threshold levels.
    • To establish normative data for speech perception in quiet and competing speech conditions.

    Related Experiment Videos

    Main Methods:

    • Forty normal-hearing children aged 3-6 years participated.
    • Monosyllabic words and sentences from the PSI test were presented in quiet and with a competing speech message.
    • Message-to-competition ratios were fixed at +4 dB for words and 0 dB for sentences.

    Main Results:

    • Maximum speech intelligibility scores reached 100% across all children and conditions.
    • The steepness of PSI-PI functions ranged from 8 to 12 dB, indicating the intensity range for performance change.
    • Speech threshold levels (50% correct) varied between 21 and 26 dB SPL.
    • Chronological age generally did not affect PI function steepness, except for sentences in competition where steepness increased with age.
    • A significant developmental trend related to chronological age was observed for all speech threshold results.

    Conclusions:

    • Pediatric Speech Intelligibility (PSI) test materials yield measurable performance-intensity functions in young children.
    • Speech recognition thresholds show a developmental progression with chronological age in normal-hearing children.
    • While function steepness is largely age-independent, thresholds indicate developing auditory processing skills related to age.