No AccessJournal of Speech, Language, and Hearing ResearchResearch Article1 Aug 1997

The Percentage of Consonants Correct (PCC) Metric

Extensions and Reliability Data

    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.

    References

    • Dollaghan, C. A. (1995, June). Phonological working memory and new phonological learning. Paper presented at the Symposium on Research in Child Language Disorders, Madison, WI.
    • Dollaghan, C. A., Biber, M., Campbell, T. (1993). Constituent syllable effects in a nonsense-word repetition task [research note].Journal of Speech and Hearing Research, 36, 1051–1054.
    • Kent, R. D., Miolo, G., & Bloedel, S. (1994). The intelligibility of children’s speech: A review of evaluation procedures.American Journal of Speech-Language Pathology, 3(2), 81–95.
    • Lewis, B. A., & Shriberg, L. D. (1994, November). Life span interrelationships among speech, prosody-voice, and nontraditional phonological measures. Miniseminar presented at the Annual Convention of the American Speech-Language-Hearing Association, New Orleans, LA.
    • Lof, G. L. (1994). A study of phoneme perception and speech stimulability. Unpublished doctoral dissertation, University of Wisconsin-Madison.
    • Morrison, J. A., & Shriberg, L. D. (1992). Articulation testing versus conversational speech sampling.Journal of Speech and Hearing Research, 35, 259–273.
    • Shriberg, L. D. (1986). PEPPER: Programs to examine phonetic and phonologic evaluation records. Hillsdale, NJ: Lawrence Erlbaum.
    • Shriberg, L. D. (1993). Four new speech and prosody-voice measures for genetics research and other studies in developmental phonological disorders.Journal of Speech and Hearing Research, 36, 105–140.
    • Shriberg, L. D. (1995, December). Some perspectives on teaching the undergraduate phonetics course. Paper presented at the Annual Convention of the American Speech-Language-Hearing Association, Orlando, FL.
    • Shriberg, L. D., Austin, D., Lewis, B. A., McSweeny, J. L., & Wilson, D. L. (1997). The Speech Disorders Classification System (SDCS): Extensions and lifespan reference data.Journal of Speech, Language, and Hearing Research, 40, 723–740.
    • Shriberg, L. D., Gruber, F. A., & Kwiatkowski, J. (1994). Developmental phonological disorders III: Long-term speech-sound normalization.Journal of Speech and Hearing Research, 37, 1151–1177.
    • Shriberg, L. D., & Kent, R. D. (1995). Clinical phonetics (2nd ed.). Boston: Allyn & Bacon.
    • Shriberg, L. D., & Kwiatkowski, J. (1982). Phonological disorders III: A procedure for assessing severity of involvement.Journal of Speech and Hearing Disorders, 47, 256–270.
    • Shriberg, L. D., & Kwiatkowski, J. (1985). Continuous speech sampling for phonologic analyses of speech-delayed children.Journal of Speech and Hearing Disorders, 50, 323–334.
    • Shriberg, L. D., & Kwiatkowski, J. (1994). Developmental phonological disorders I: A clinical profile.Journal of Speech and Hearing Research, 37, 1100–1126.
    • Shriberg, L. D., Kwiatkowski, J., Best, S., Hengst, J., & Terselic-Weber, B. (1986). Characteristics of children with phonologic disorders of unknown origin.Journal of Speech and Hearing Disorders, 51, 140–161.
    • Shriberg, L. D., Kwiatkowski, J., & Hoffmann, K. A. (1984). A procedure for phonetic transcription by consensus.Journal of Speech and Hearing Research, 27, 456–465.
    • Shriberg, L. D., & Lof, G. L. (1991). Reliability studies in broad and narrow phonetic transcription.Clinical Linguistics and Phonetics, 5, 225–279.
    • Shriberg, L. D., & Olson, D. (1988). PEPAGREE: A program to compute transcription reliability. Waisman Center Research Computing Facility, University of Wisconsin-Madison.
    • Stoel-Gammon, C., & Dunn, C. (1985). Normal and disordered phonology in children. Baltimore: University Park Press.
    • Tomblin, J. B. (1991). Epidemiology of specific language impairment (Grant No. N01-DC-1-2101). Bethesda, MD: National Institute on Deafness and Other Communication Disorders, National Institutes of Health.

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