TY - JOUR
T1 - The Apraxia of Speech Rating Scale
T2 - Reliability, Validity, and Utility
AU - Duffy, Joseph R.
AU - Martin, Peter R.
AU - Clark, Heather M.
AU - Utianski, Rene L.
AU - Strand, Edythe A.
AU - Whitwell, Jennifer L.
AU - Josephs, Keith A.
N1 - Funding Information:
Convergent and divergent construct validity is also supported by ASRS component score relationships. That is, the phonetic, prosodic, and other component subscores were each moderately or strongly correlated with the Total score, with each other, and with the AOS severity rating and MSDSR. The moderate correlation (.52) of the phonetic component with the AES (a measure of sound-level errors) and the comparatively weaker correlation of the prosodic component (.27) with the AES support the convergent validity of the phonetic subscore as an index of speech sound impairment and the relative divergence from that construct for the rate and prosodic features presumably tapped by the prosodic subscore. Like the Total score findings, correlations between component subscores and age and dysarthria and aphasia severity were weak. For reasons provided for the Total score, time post onset was also weakly correlated with each of the component scores.
Funding Information:
This study was funded by the National Institutes of Health, National Institute on Deafness and Other Communication Disorders Grants R01 DC014942 (PI: Keith A. Josephs) and R01 DC012519 (PI: Jennifer L. Whitwell), and National Institute of Neurological Disorders and Stroke Grant R01 NS089757 (PI: Jennifer L. Whitwell).
Publisher Copyright:
© 2023 The Authors.
PY - 2023/3
Y1 - 2023/3
N2 - Purpose: The purpose of this study was to examine the interrater reliability and validity of the Apraxia of Speech Rating Scale (ASRS-3.5) as an index of the presence and severity of apraxia of speech (AOS) and the prominence of several of its important features. Method: Interrater reliability was assessed for 27 participants. Validity was examined in a cohort of 308 participants (120 with and 188 without progressive AOS) through item analysis; item-Total score correlations; correlations among ASRS Total score and component subscores and independent clinical ratings of AOS, dysarthria and aphasia severity, intelligibility, and articulatory errors, as well as years postonset and age; and regression models assessing item and Total score prediction of AOS presence. Results: Interrater reliability was good or excellent for most items and excellent for the Total score. Item and Total score analyses revealed good separation of participants with versus without AOS. Inter-item and item-Total score correlations were generally moderately high as were correlations between the ASRS Total score and independent ratings of AOS severity, intelligibility, and articulatory errors. The Total score was not meaningfully correlated with ratings of aphasia and dysarthria severity, years postonset, or age. Total scores below 7 and above 10 revealed excellent diagnostic sensitivity and specificity for AOS. The presence of eight or more abnormal features was also highly predictive of AOS presence. Conclusions: The ASRS-3.5 is a reliable and valid scale for identifying the presence and severity of AOS and its predominant features. It has excellent sensitivity to AOS presence and excellent specificity relative to aphasia and dysarthria in patients with neurodegenerative disease.
AB - Purpose: The purpose of this study was to examine the interrater reliability and validity of the Apraxia of Speech Rating Scale (ASRS-3.5) as an index of the presence and severity of apraxia of speech (AOS) and the prominence of several of its important features. Method: Interrater reliability was assessed for 27 participants. Validity was examined in a cohort of 308 participants (120 with and 188 without progressive AOS) through item analysis; item-Total score correlations; correlations among ASRS Total score and component subscores and independent clinical ratings of AOS, dysarthria and aphasia severity, intelligibility, and articulatory errors, as well as years postonset and age; and regression models assessing item and Total score prediction of AOS presence. Results: Interrater reliability was good or excellent for most items and excellent for the Total score. Item and Total score analyses revealed good separation of participants with versus without AOS. Inter-item and item-Total score correlations were generally moderately high as were correlations between the ASRS Total score and independent ratings of AOS severity, intelligibility, and articulatory errors. The Total score was not meaningfully correlated with ratings of aphasia and dysarthria severity, years postonset, or age. Total scores below 7 and above 10 revealed excellent diagnostic sensitivity and specificity for AOS. The presence of eight or more abnormal features was also highly predictive of AOS presence. Conclusions: The ASRS-3.5 is a reliable and valid scale for identifying the presence and severity of AOS and its predominant features. It has excellent sensitivity to AOS presence and excellent specificity relative to aphasia and dysarthria in patients with neurodegenerative disease.
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U2 - 10.1044/2022_AJSLP-22-00148
DO - 10.1044/2022_AJSLP-22-00148
M3 - Article
C2 - 36630926
AN - SCOPUS:85150001167
SN - 1058-0360
VL - 32
SP - 469
EP - 491
JO - American Journal of Speech-Language Pathology
JF - American Journal of Speech-Language Pathology
IS - 2
ER -