Translation, Validation and Reliability Study of the Korean Version of Apraxia of Speech Rating Scale (K-ASRS) in...

Apraxia of speech (AOS) is a motor speech disorder that occurs despite the absence of paralysis, weakness, or incoordination of the speech muscles and is characterized by difficulty in planning, programming, and sequencing speech movements. Currently, the Korean language lacks sufficient measures for evaluating AOS, whereas the Apraxia of Speech Rating Scale (ASRS) has been widely used internationally to assess the presence and severity of AOS. This study aimed to translate the Apraxia of Speech Rating Scale into Korean (K-ASRS) and verify its reliability and validity. The translation process comprised four stages: forward and backward translation, expert committee review, and author approval. Thirty native Korean speakers aged 18 years or older with post-stroke aphasia participated. Three speech-language pathologists conducted two assessments over 1 month, and intra- and inter-rater reliability were evaluated using internal consistency and intraclass correlation coefficients. Among the 30 participants, six were diagnosed with AOS. The K-ASRS effectively distinguished the presence of AOS, showing strong internal validity and excellent inter-rater reliability overall, although items five, six, and eight demonstrated only fair agreement. The K-ASRS demonstrated good-to-excellent validity and reliability in patients with post-stroke aphasia and showed high clinical utility because of its short administration time and applicability to both in-person and video assessments.