title: The percentage of consonants correct (PCC) metric: extensions and reliability data.
abstract: 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 metric including the PCC. Discussion includes rationale for selecting one or more of the 10 metrics for specific clinical and research needs.
authors.affiliation: Waisman Center on Mental Retardation and Human Development, University of Wisconsin-Madison 53705, USA. shriberg@waisman.wisc.edu
authors.forename: L D
authors.initials: LD
authors.lastname: Shriberg
authors.forename: D
authors.initials: D
authors.lastname: Austin
authors.forename: B A
authors.initials: BA
authors.lastname: Lewis
authors.forename: J L
authors.initials: JL
authors.lastname: McSweeny
authors.forename: D L
authors.initials: DL
authors.lastname: Wilson
mesh_terms: D000293:Adolescent; D000328:Adult; D001184:Articulation Disorders / Q000175:diagnosis*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D010700:Phonetics; D011897:Random Allocation; D015203:Reproducibility of Results; D013068:Speech Production Measurement