마비말장애 평가시스템 개발을 위한 정상 성인 대상 표준화 연구

초록

Purpose: This study aimed to validate the reliability and validity of the Dysarthria Assessment System (DAS), a web-based auditory-perceptual tool designed for the evaluation of dysarthria, and to establish normative data in healthy older adults. Methods: The Dysarthria Assessment System comprises 80 items across three domains—speech mechanism, speech, and speech motor function—scored on a 3-point scale (2=normal, 1=mild, 0=severe). Data were collected from 328 adults aged 50 years and older. Inter-rater reliability, internal consistency, construct validity, criterion validity, content validity, and system usability were assessed. One-way ANOVA was performed to establish age-based norms. Results: Inter-rater agreement was 99.04%, and internal consistency was acceptable (Cronbach’s α=.808). The Dysarthria Assessment System total score showed significant correlations with subdomain scores and corresponding measures from established tools, confirming construct and criterion validity. Content validity was high (S-CVI=.97), and system usability scores (SUS) indicated excellent user acceptability. Norms for speech mechanism and speech were stratified into two age groups (50~79 and ≥80 years), while speech motor norms were established across four age groups (50s, 60s, 70s, ≥80s) based on percentile ranks. Conclusions: The Dysarthria Assessment System is a standardized, reliable, and valid web-based instrument for assessing dysarthria. Its automated scoring and reporting system offers clinical and research utility for the diagnosis, severity classification, and monitoring of speech motor impairments in adult populations.

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