Perceptual Outcome Measures for Supplementing Transcription Intelligibility in Speakers with Parkinson's Disease and Mild Dysarthria.
Jordan L Manes, Kaila L Stipancic, Lily Westemeyer and 5 others
PMID 41632721WHAT IT FOUND
Transcription intelligibility scores hit a ceiling in mild Parkinson's, hiding subtle speech changes.
Rating how effortful it was to listen, or how severe the speech seemed, captured a wider range of differences. These measures tracked closely with clinical severity ratings, offering a more sensitive picture than accuracy alone.
Key findings
01Listener effort and speech severity ratings correlated with clinical MDS-UPDRS speech scores, providing convergent validity with expert neurological assessments.
02While intelligibility scores were near-ceiling and identical between groups, listener effort and severity ratings showed broader ranges of scores, capturing subtle differences.
03Speech naturalness ratings were statistically distinct from other measures but had poor reliability, limiting their clinical utility for this task.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study did not find statistically significant differences between the Parkinson's and control groups on any measure, so it proves sensitivity to variation but not diagnostic discrimination. Control group size was smaller (14) than the Parkinson's group (30), potentially limiting the ability to detect group differences. Intrarater reliability for listener effort was not collected. Speech naturalness ratings had poor reliability in this study. The study used read sentences; spontaneous speech might yield different results for naturalness.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not interpret the broader range of listener effort and severity scores as proof that these measures diagnose Parkinson's. The study failed to statistically distinguish the Parkinson's group from the control group on any measure, including these new ones. They are supplementary tools for characterizing impairment in known cases, not diagnostic screens.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →