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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Auditory performance characteristics of the Computerized Revised Token Test (CRTT).

Cynthia A Eberwein1, Sheila R Pratt, Malcolm R McNeil

  • 1VA Pittsburgh Healthcare System, Audiology and Speech Pathology, 7180 Highland Drive, Pittsburgh, PA 15206, USA. Cynthia.Eberwein@va.gov

Journal of Speech, Language, and Hearing Research : JSLHR
|August 7, 2007
PubMed
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Normal-hearing individuals need minimal audibility for maximum performance on the Computerized Revised Token Test (CRTT). Speech distortions like time and frequency compression/expansion impact CRTT performance, informing test interpretation.

Area of Science:

  • Audiology
  • Speech-Language Pathology
  • Psychoacoustics

Background:

  • The Computerized Revised Token Test (CRTT) is a tool used to assess speech understanding.
  • Understanding how various acoustic conditions affect CRTT performance is crucial for accurate interpretation.

Purpose of the Study:

  • To evaluate the performance of individuals with normal hearing on the CRTT under different intensity, spectral, and temporal conditions.
  • To investigate the impact of acoustic distortions on CRTT scores.

Main Methods:

  • Sixty normal-hearing listeners were divided into three groups.
  • Group 1 assessed CRTT performance with uncompressed stimuli.
  • Groups 2 and 3 completed the CRTT with temporally and spectrally compressed/expanded stimuli.

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Main Results:

  • Normal-hearing listeners achieved maximum CRTT performance with minimal audibility.
  • Significant performance differences were observed across subtests with spectral and temporal distortions.
  • Performance decrements increased beyond 40% time compression; time expansion showed one significant difference; frequency compression/expansion yielded no significant differences.

Conclusions:

  • Limited signal gain is sufficient for optimal CRTT performance in young, normal-hearing listeners.
  • Findings align with previous research on speech stimuli processing under distortion.
  • Results aid in CRTT administration and interpretation for diverse populations and normative database development.