The Speech Disorders Classification System (SDCS) Extensions and Lifespan Reference Data Research Article
Research Article  |   August 1997
The Speech Disorders Classification System (SDCS)
 
Author Affiliations & Notes
  • Lawrence D. Shriberg, PhD
    University of Wisconsin-Madison
    The Phonology Project, Waisman Center on Mental Retardation and Human Development, University of Wisconsin–Madison, 1500 Highland Avenue, Madison, WI 53705
  • Diane Austin
    University of Wisconsin-Madison
  • Barbara A. Lewis
    Case Western Reserve University Cleveland, OH
  • Jane L. McSweeny
    University of Wisconsin-Madison
  • David L. Wilson
    University of Wisconsin-Madison
Article Information
Speech, Voice & Prosodic Disorders / Language / Research Articles
Research Article   |   August 1997
The Speech Disorders Classification System (SDCS)
Journal of Speech, Language, and Hearing Research, August 1997, Vol. 40, 723-740. doi:10.1044/jslhr.4004.723
History: Received March 8, 1996 , Accepted November 29, 1996
 
Journal of Speech, Language, and Hearing Research, August 1997, Vol. 40, 723-740. doi:10.1044/jslhr.4004.723
History: Received March 8, 1996; Accepted November 29, 1996

A companion paper includes rationale for the use of 10 metrics of articulation competence in conversational speech (Shriberg, Austin, Lewis, McSweeny, & Wilson, 1997). The present paper reports lifespan reference data for these measures using records from a total of 836 3– to 40+-year-old speakers with normal and disordered speech. The reference data are subdivided by diagnostic classification based on extensions to an instrument titled the Speech Disorders Classification System (SDCS; Shriberg, 1993). Appendices provide procedural information on the SDCS and statistical rationale for the reference data.

Acknowledgments
Preparation of this article was supported by research grants R01 DC00496-08 and R01 DC00528-07 from the National Institute on Deafness and Other Communication Disorders, National Institutes of Health. We thank the following people who provided research expertise, research assistance, and/or thoughtful discussion about measurement issues associated with the PCC and the SDCS at different stages of this project: Paula Buckwalter, Michael Chial, Mary Elbert, Peter Flipsen Jr., Lisa Freebairn, Frederic Gruber, Barbara Hodson, Doris Kistler, Joan Kwiatkowski, Gregory Lof, Julie Masterson, Karen Pollock, Bruce Pennington, Carmen Rasmussen, Nancy Records, Dorothy Ross, Hollis Scarborough, Nicholas Schork, Bruce Tomblin, Carol Widder, and Xuyang Zhang.
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