Table 1.
Clinical metrics of intelligibility and speech severity for speaker groups.
| Group | Mean % single-word intelligibility a | Mean % sentence intelligibility b | Mean scaled speech severity score c |
|---|---|---|---|
| Control | 97 (.01) | 94 (2.7) | 0.18 (.08) |
| MS | 96 (.03) | 93 (4.5) | 0.44 (.25) |
| PD | 95 (.03) | 85 (10) | 0.46 (.21) |
Note. Standard deviations are in parentheses. MS = multiple sclerosis; PD = Parkinson's disease.
a
Single-word test of Kent, Weismer, Kent, and Rosenbek (1989).
b
Orthographic transcription of sentences from the Sentence Intelligibility Test (Yorkston, Beukelman, & Tice, 1996).
c
Score on a visual analog scale of overall speech impairment for a reading passage as judged by three speech pathologists (0 = no impairment, 1 = severe impairment).