Psychometric Functions for Shortened Administrations of a Speech Recognition Approach Using Tri-Word Presentations and Phonemic Scoring MethodComplete psychometric functions for phoneme and word recognition scores at 8 signal-to-noise ratios from −15 dB to 20 dB were generated for the first 10, 20, and 25, as well as all 50, three-word presentations of the Tri-Word or Computer Assisted Speech Recognition Assessment (CASRA) Test (Gelfand, 1998) based on ... Research Note
Research Note  |   June 01, 2012
Psychometric Functions for Shortened Administrations of a Speech Recognition Approach Using Tri-Word Presentations and Phonemic Scoring
 
Author Affiliations & Notes
  • Stanley A. Gelfand
    Queens College, Flushing, NY
  • Jessica T. Gelfand
    Touro College, New York, NY
  • Correspondence to Stanley A. Gelfand: stanley.gelfand@qc.cuny.edu
  • Editor: Sid Bacon
    Editor: Sid Bacon×
  • Associate Editor: Majorie Leek
    Associate Editor: Majorie Leek×
Article Information
Hearing
Research Note   |   June 01, 2012
Psychometric Functions for Shortened Administrations of a Speech Recognition Approach Using Tri-Word Presentations and Phonemic Scoring
Journal of Speech, Language, and Hearing Research, June 2012, Vol. 55, 879-891. doi:10.1044/1092-4388(2011/11-0123)
History: Received May 20, 2011 , Accepted August 23, 2011
 
Journal of Speech, Language, and Hearing Research, June 2012, Vol. 55, 879-891. doi:10.1044/1092-4388(2011/11-0123)
History: Received May 20, 2011; Accepted August 23, 2011
Web of Science® Times Cited: 2

MethodComplete psychometric functions for phoneme and word recognition scores at 8 signal-to-noise ratios from −15 dB to 20 dB were generated for the first 10, 20, and 25, as well as all 50, three-word presentations of the Tri-Word or Computer Assisted Speech Recognition Assessment (CASRA) Test (Gelfand, 1998) based on the results of 12 normal-hearing young adult participants from the original study.

ResultsThe psychometric functions for both phoneme and word scores were very similar and essentially overlapping for all set sizes. Performance on the shortened tests accounted for 98.8% to 99.5% of the full (50-set) test variance with phoneme scoring, and 95.8% to 99.2% of the full test variance with word scoring. Shortening the tests accounted for little if any of the variance in the slopes of the functions.

ConclusionsThe psychometric functions for abbreviated versions of the Tri-Word speech recognition test using 10, 20, and 25 presentation sets were described and are comparable to those of the original 50-presentation approach for both phoneme and word scoring in healthy, normal-hearing, young adult participants.

Acknowledgments
This work was supported, in part, by City University of New York PSC-BHE Grants 663451, 665535, and 666535. We are indebted to Edward S. O'Connor, who provided valuable and constructive insights and suggestions.
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