title: Voice onset time in Swedish children with phonological impairment.
abstract: Mastering spatial and temporal co-ordination in speech production is a challenge for children. Voice onset time (VOT) reflects timing in speech. The objective was to study VOT in Swedish children with a diagnosed phonological impairment and compare results with normative data. Thus 38 children, aged 4-11 years, in three age-groups were audio-recorded when producing minimal pairs with the plosives /p b t d k g/. Waveforms and spectrograms were analysed. Results show that children with phonological impairment produced plosives with deviant VOT values and greater variability compared to normative data. No developmental trend was seen with increasing age. Also, no relationship was found between VOT values and degree of impairment measured by percentage phonemes correct. Furthermore no relation was found between number of errors on auditory discrimination of nine minimal pairs with the different plosives and number of deviant VOT. Findings were interpreted as displaying motor co-ordination difficulties.
authors.affiliation: a Department of Clinical and Experimental Medicine , Division of Speech and Language Pathology, Linköping University , Sweden.
authors.forename: Inger
authors.initials: I
authors.lastname: Lundeborg
authors.affiliation: a Department of Clinical and Experimental Medicine , Division of Speech and Language Pathology, Linköping University , Sweden.
authors.forename: Elin
authors.initials: E
authors.lastname: Nordin
authors.affiliation: a Department of Clinical and Experimental Medicine , Division of Speech and Language Pathology, Linköping University , Sweden.
authors.forename: Marie
authors.initials: M
authors.lastname: Zeipel-Stjerna
authors.affiliation: a Department of Clinical and Experimental Medicine , Division of Speech and Language Pathology, Linköping University , Sweden.|b Department of Clinical Science , Intervention and Technology, Karolinska Institute , Stockholm , Sweden.
authors.forename: Anita
authors.initials: A
authors.lastname: McAllister
mesh_terms: D000162:Acoustics; D000328:Adult; D000367:Age Factors; D002648:Child; D002663:Child Language; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009048:Motor Skills; D010700:Phonetics; D013018:Sound Spectrography; D013061:Speech Acoustics; D013068:Speech Production Measurement; D066229:Speech Sound Disorder / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology; D013997:Time Factors; D014833:Voice Quality
keywords: Child; speech sound disorders; voice onset time