The Japanese journal of neuropsychology

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ArticleTitle	Characteristics of speech duration and assessment index in apraxia of speech in Japanese speakers
Language	J
AuthorList	Keita Kawabe¹⁾, Ikuyo Fujita²⁾
Affiliation	¹⁾Noukyoukyousai Nakaizu Rehabilitation Center Department of Rehabilitation ²⁾International University of Health and Welfare Graduate School of Health and Welfare Science
Publication	Japanese Journal of Neuropsychology: 40 (2), 143-152, 2024
Received	Dec 19, 2023
Accepted	Mar 2, 2024
Abstract	The purpose of the study was to conduct an acoustic analysis of speech duration characteristics in Japanese speakers with apraxia of speech (Apraxia of Speech: AOS) and to identify an assessment index for AOS. Seventeen participants in the AOS group and twenty healthy controls undertook a task involving continuous recitation of 3-mora words. An acoustic analysis was conducted on parameters related to speech duration. The results showed that the AOS group exhibited significantly longer durations in total speech, speech onset, vowel duration, and syllable transition times compared to the healthy group. Furthermore, vowel duration was associated with the prolongation of total speech duration. The cut-off values for 3-mora words calculated based on those results were 586 msec for total speech duration and 491 msec for speech onset time, and which were shown to be the criteria for discriminating AOS speech from healthy speech.
Keywords	apraxia of speech, speech duration, acoustics characteristics, assessment index