Effects of methodological parameters on signal detection and frequency discrimination

Auteurs-es

  • S.M. Abel Hearing Res. Lab., Samuel Lunenfeld Res. Inst., Mount Sinai Hospital, Toronto, Ont., Canada
  • J.C. Tanny Hearing Res. Lab., Samuel Lunenfeld Res. Inst., Mount Sinai Hospital, Toronto, Ont., Canada

Mots-clés :

hearing, 2IFC paradigm, signal detection, stimulus duration, practice, auditory detection threshold, frequency discrimination limen, normal-hearing listeners, detection threshold, detection reaction time, 4IFC paradigm, acuity, 2 kHz

Résumé

Cette étude a pour but de determiner les effets de la variation de 3 paramétres méthodologiques, à savoir le paradigme (2IFC vs 4IFC), la durée du stimulus (50 ms vs 300 ms) et l'entraînement (1 vs 6 repetitions) sur le seuil de détection auditive, le seuil de discrimination fréquentielle et le temps de réaction associé à chacune de ces tâches. Les trois sujets avaient moins de 30 ans et présentaient une audition normale. En accord avec les prédictions, une augmentation de la durée du stimulus a provoqué une amélioration significative du seuil de détection et du temps de réaction mais n'a pas affecté la discrimination. Tel que prévu, le paradigme n'affecte pas la détection. Le paradigme 4IFC a toutefois réduit l'acuité à un changement de fréquence, parce que le problème est possiblement devenu un problème de reconnaissance de structures. Contrairement aux attentes, l'entraînement n'a pas influence l'un ou l'autre des processus sensoriels ni le temps de réaction.

Fichiers supplémentaires

Publié-e

1994-06-01

Comment citer

1.
Abel S, Tanny J. Effects of methodological parameters on signal detection and frequency discrimination. Canadian Acoustics [Internet]. 1 juin 1994 [cité 14 mai 2026];22(2):19-25. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/829

Numéro

Vol. 22 No. 2 (1994)

Rubrique

Articles techniques

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