Multiple Looks in Speech Sound Discrimination in Adults

Autor/inn/en	Holt, Rachael Frush; Carney, Arlene Earley
Titel	Multiple Looks in Speech Sound Discrimination in Adults
Quelle	In: Journal of Speech, Language, and Hearing Research, 48 (2005) 4, S.922-943 (22 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/1092-4388(2005/064)
Schlagwörter	Auditory Perception; Acoustics; Hearing Impairments; Adults; Communication Research; Auditory Discrimination; Stimuli; Speech; Auditory Tests; Performance; Phonemes + Suchen Sie Ihr Suchwort? Auditive Wahrnehmung; Akustische Wahrnehmung; Akustik; Hearing impairment; Hörbehinderung; Kommunikationsforschung; Anreizsystem; Speaking; Sprechen; Auditory test; Autismus; Achievement; Leistung; Fonem
Abstract	N. F. Viemeister and G. H. Wakefield's (1991) multiple looks hypothesis is a theoretical approach from the psychoacoustic literature that has promise for bridging the gap between results from speech perception research and results from psychoacoustic research. This hypothesis accounts for sensory detection data and predicts that if the "looks" at a stimulus are independent and information is combined optimally, sensitivity should increase for 2 pulses relative to 1 pulse. Specifically, d' (a bias-free measure of sensitivity) for 2 pulses should be larger than d' for 1 pulse. One speech discrimination paradigm that presents stimuli with multiple presentations is the change/no-change procedure. On a change trial, the standard and comparison stimuli differ; on a no-change trial, they are the same. Normal-hearing adults were tested using the change/no-change procedure with 3 consonant-vowel minimal pairs in combinations of 1, 2, and 4 repetitions of standard and comparison stimuli at various signal-to-noise ratios. If multiple looks extend to this procedure, performance should increase with higher repetition numbers. Performance increased with more presentations of the speech contrasts tested. The multiple looks hypothesis predicted performance better at low repetition numbers when performance was near d' values of 1.0 than at higher repetition numbers and higher performance levels. (Contains 9 figures and 2 tables.) (Author).
Anmerkungen	American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail: subscribe@asha.org; Web site: http://www.asha.org/about/publications/journal-abstracts/jslhr/.
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10