Temporal disruptions in the "accurate" speech of articulatory defective speakers and stutterers.
Durational measures of vocalic steady states and transitions were made on phonetically accurate and fluently produced vowel-plosive, consonant-vowel bisyllables embedded in a carrier phrase. in the first experiment, these measures were taken from the speech of ten articulatory defective adult speakers and ten matched normal speakers. The second experiment analyzed durational measures in the speech of ten adult stutterers and ten matched nonstutterers. Using wideband spectrography, durational measurements were used to infer timing of articulatory movements during the subsegments of the VCV sequences. The results of both experiments suggest that the two groups of speech disordered subjects were able to produce transitional shifts appropriate to the phonetic environment but appeared to delay the initiation of coarticulatory movements. Aberrant speech timing may imply an involvement in the planning or integration of articulatory/coarticulatory movements rather than difficulty with movement execution per se.
McMillan
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MO
Department of Communicative Disorders, East Tennessee State University, USA.
Pindzola
R H
RH