A diagnostic marker for childhood apraxia of speech: the coefficient of variation ratio.
Terms such as isochrony, syllable segregation, scanning speech and staccato-like rhythmic quality have been used to characterize the temporal regularity that may be a core feature of apraxia of speech. The present report describes a procedure to quantify temporal regularity in children with suspecte...
| Publicado en: | Clinical Linguistics & Phonetics Vol. 17; no. 7; pp. 575 - 596 |
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| Autores principales: | , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Oct2003
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106714161&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106714161 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 02699206 B6X jtl: Clinical Linguistics & Phonetics issn: 02699206 maglogo: Y pubinfo: dt: Oct2003 vid: 17 iid: 7 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106714161 2004046464 10.1080/0269920031000138141 NLM14608800 106714161 ppf: 575 ppct: 21 formats: fmt: @attributes: type: P tig: atl: A diagnostic marker for childhood apraxia of speech: the coefficient of variation ratio. aug: au: Shriberg LD Green JR Campbell TF McSweeny JL Scheer AR affil: Phonology Project, Waisman Center, University of Wisconsin-Madison, 1500 Highland Avenue, Madison, WI 53705; shriberg@waisman.wisc.edu sug: subj: Apraxia Diagnosis Speech Disorders Diagnosis Speech Rate Evaluation Audiorecording Case Control Studies Child Child, Preschool Comparative Studies Descriptive Statistics Effect Size Female Funding Source Language Tests Male Post Hoc Analysis Signal Processing, Computer Assisted Speech Acoustics Speech Sample T-Tests Two-Tailed Test Human Child: 6-12 years Child, Preschool: 2-5 years Female Male ab: Terms such as isochrony, syllable segregation, scanning speech and staccato-like rhythmic quality have been used to characterize the temporal regularity that may be a core feature of apraxia of speech. The present report describes a procedure to quantify temporal regularity in children with suspected apraxia of speech (sAOS). Conversational speech samples from 15 such children, together with samples from 30 3-6-year-old children with normal speech acquisition and 30 3-6-year-old children with moderate to severe speech delay of unknown origin, were selected from an audio archive. Signal processing routines were developed to identify and measure the duration of speech and pause events in 24 utterances from the speech samples of each of the 75 speakers. A value termed the coefficient of variation expressed the normalized variability in the durations of each participant's speech events and pause events within each utterance. A metric termed the coefficient of variation ratio, derived by dividing the coefficient of variation for pause events by the coefficient of variation for speech events, expressed a speaker's relative temporal variation in the two domains. The 15 children with sAOS had higher coefficient of variation ratios than the 30 children in each of the two comparison groups, indicating that the children with sAOS had proportionally more variation in the duration of pause events and/or less variation in the duration of speech events. Findings are interpreted as supporting the view that a constraint in speech timing is a core feature of the praxis disorder that defines a developmental form of apraxia of speech. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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