FIABILITE, SENSIBILITE ET VALIDITE DU JUGEMENT DE L'INTELLIGIBILITE DE LA PAROLE OBTENUES PAR ESTIMATION DE LA GRANDEUR, ESTIMATION CATEGORIELLE ET COMPARAISON PAR PAIRES CHEZ DES SUJETS AGES

S. C. Purdy*, C. V. Pavlovic

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This study investigated the reliability, sensitivity, and validity of speech intelligibility judgments for hearing aid evaluation. Subjects aged 60-87 years judged the intelligibility of sentences using either magnitude estimation, category scaling or paired comparisons. The 60+ age group was chosen as representative of the majority of hearing aid wearers. Speech recognition scores for Central Institute for the Deaf (CID) sentences and Northwestern University Auditory Test No. 6 (NU-6) words were also obtained. The speech was bandpass filtered using filter settings that produce a monotonic increase in predicted intelligibility based on articulation index theory. Speech recognition scores and intelligibility judgments were obtained for each of eight filter conditions. Test-retest reliability was poorest for paired comparisons and CID sentence scores. There were no differences in sensitivity among the three psychophysical procedures. Intelligibility judgments and NU-6 scores were more sensitive than CID sentence scores to differences among conditions. The results indicated that intelligibility judgments are valid measures of speech recognition.

Original languageEnglish
Pages (from-to)254-271
Number of pages18
JournalAudiology
Volume31
Issue number5
Publication statusPublished - 1992

Keywords

  • Category scaling
  • Hearing aids
  • Magnitude estimation
  • Paired comparisons
  • Psychophysical scaling
  • Rating scale
  • Speech intelligibility

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