The Percentage of Consonants Correct (PCC) Metric Extensions and Reliability Data Research Article
Research Article  |   August 01, 1997
The Percentage of Consonants Correct (PCC) Metric
 
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
    The Phonology Project, Waisman Center on Mental Retardation and Human Development, University of Wisconsin-Madison, 1500 Highland Avenue, Madison, WI 53705
  • Jane L. McSweeny
    University of Wisconsin-Madison
  • David L. Wilson
    University of Wisconsin-Madison
Article Information
Speech, Voice & Prosodic Disorders / Speech, Voice & Prosody / Language / Research Articles
Research Article   |   August 01, 1997
The Percentage of Consonants Correct (PCC) Metric
Journal of Speech, Language, and Hearing Research, August 1997, Vol. 40, 708-722. doi:10.1044/jslhr.4004.708
History: Received March 8, 1996 , Accepted November 29, 1996
 
Journal of Speech, Language, and Hearing Research, August 1997, Vol. 40, 708-722. doi:10.1044/jslhr.4004.708
History: Received March 8, 1996; Accepted November 29, 1996

Research in normal and disordered phonology requires measures of speech production that are biolinguistically appropriate and psychometrically robust. Their conceptual and numeric properties must be well characterized, particularly because speech measures are increasingly appearing in large-scale epidemiologic, genetic, and other descriptive-explanatory database studies. This work provides a rationale for extensions to an articulation competence metric titled the Percentage of Consonants Correct (PCC; Shriberg & Kwiatkowski, 1982; Shriberg, Kwiatkowski, Best, Hengst, & Terselic-Weber, 1986), which is computed from a 5- to 10-minute conversational speech sample. Reliability and standard error of measurement estimates are provided for 9 of a set of 10 speech metrics, including the PCC. Discussion includes rationale for selecting one or more of the 10 metrics for specific clinical and research needs.

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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