An Investigation of Speech Perception in Children With Specific Language Impairment on a Continuum of Formant Transition Duration Fifteen children diagnosed with specific language impairment (SLI) and 15 typically developing (TD) children were tested for identification performance on 2 synthetic speech continua varying in formant transition durations (FTDs). One continuum varied from /ba/ to /wa/, and the other varied from /da/ to /ja/. Various d'-related measures from signal ... Research Article
Research Article  |   August 01, 2005
An Investigation of Speech Perception in Children With Specific Language Impairment on a Continuum of Formant Transition Duration
 
Author Affiliations & Notes
  • Elizabeth Burlingame
    The University of Texas at Austin
  • Harvey M. Sussman
    The University of Texas at Austin
  • Ronald B. Gillam
    The University of Texas at Austin
  • Jessica F. Hay
    The University of Texas at Austin
  • Corresponding author: e-mail: rbg@mail.utexas.edu
Article Information
Language Disorders / Specific Language Impairment / Language / Research Articles
Research Article   |   August 01, 2005
An Investigation of Speech Perception in Children With Specific Language Impairment on a Continuum of Formant Transition Duration
Journal of Speech, Language, and Hearing Research, August 2005, Vol. 48, 805-816. doi:10.1044/1092-4388(2005/056)
History: Received December 18, 2003 , Revised June 2, 2004 , Accepted December 5, 2004
 
Journal of Speech, Language, and Hearing Research, August 2005, Vol. 48, 805-816. doi:10.1044/1092-4388(2005/056)
History: Received December 18, 2003; Revised June 2, 2004; Accepted December 5, 2004
Web of Science® Times Cited: 13

Fifteen children diagnosed with specific language impairment (SLI) and 15 typically developing (TD) children were tested for identification performance on 2 synthetic speech continua varying in formant transition durations (FTDs). One continuum varied from /ba/ to /wa/, and the other varied from /da/ to /ja/. Various d'-related measures from signal detection theory were used to compare category boundaries and indirectly derive sensitivity to phonetic changes in category tokens along each continuum. The SLI group showed less consistent identification performance along the /ba/-/wa/ series relative to the TD group, as well as reduced sensitivity to phonetic changes along the continuum. On the /da/-/ja/ series, the SLI group revealed less consistent identification performance on the short FTD end but similar identification levels to the TD group at the long FTD end. The overall results support the contention that children with SLI reveal a deficiency in the processing of speech sounds at the level of segmental identity.

Acknowledgment
Portions of this article are based on a master”s thesis submitted by the first author.
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