The reliability of the Communicative Performance Measure （CPM） for individuals with dysarthria

Nakamura A, Funaki T, Hasegawa J, Ozawa Y:
Japanese Journal of Speech, Language, and Hearing Research, 18:295-305, 2021

Abstract
The Communicative Performance Measure（CPM）was　designed to measure comprehensibility and degree of　satisfaction of daily communication for individuals with dysarthria．
The purposes of this study were to provide　preliminary evidence for the reliability of CPM, possible
differences in the scores between individuals with dysarthria　and their communication partners, and how CPM scores relate to speech intelligibility scores．
We applied CPM to 14 pairs of individuals with dysarthria and their communication partners．
In the results, substantial agreements（0.61≦κ≦0.80) or almost perfect agreements（0.81≦κ<1.00）were found between initial  and re-rating of CPM. 
There were significant correlations（rs>0.8）between
comprehensibility and satisfaction of daily communication by　individuals with dysarthria．
On the other hand, there was no significant correlation between comprehensibility or satisfaction of daily communication by the participants（individuals with dysarthria and their communication partners）and speech intelligibility rated by speech-language-hearing therapists（SLHTs）．
These results showed that SLHTs could not effectively　evaluate communicative performance in daily life only based　on assessment and observation of speech in clinical situations．
The ratings of comprehensibility and satisfaction of daily communication by individuals with dysarthria were
not consistent with those by their communication partners．　These findings suggest that CPM is a useful tool for　individuals with dysarthria, their communication partners and　SLHTs to share their views and discuss daily communicative　performances．