Table 6.
Correlation matrices of performance on the acoustic features for the clinical groups as a whole and for each clinical group individually (* = p < .05, ** = p < .01, *** = p < .001).
| Pairwise Correlations | All | ALS | PA | PD | nfPPA+PAOS |
|---|---|---|---|---|---|
| Coordination x Consistency | −.03 | .05 | −.24 | −.15 | .68 |
| Coordination x Speed | −.15* | −.07 | −.20 | −.09 | −.30 |
| Coordination x Precision | −.16* | −.13 | −.19 | −.14 | .36 |
| Coordination x Rate | .09 | −.08 | −.21 | .09 | .57** |
|
| |||||
| Consistency x Speed | .01 | .04 | .03 | .08 | −.08 |
|
| |||||
| Consistency x Precision | −.002 | .003 | −.18 | .19 | .08 |
|
| |||||
| Consistency x Rate | .25*** | .10 | .22 | .09 | .33 |
|
| |||||
| Speed x Precision | .68*** | .73*** | .63*** | .54*** | .17 |
|
| |||||
| Speed x Rate | .43*** | .58*** | .51*** | .29* | −.18 |
|
| |||||
| Precision x Rate | .58*** | .72*** | .70*** | .31** | .53* |
Note. ALS = amyotrophic lateral sclerosis; PA = progressive ataxia; PD = Parkinson’s disease; nfPPA+PAOS = the nonfluent variant of primary progressive aphasia and progressive apraxia of speech.