Table 5.
Statistical Analysis Results for the Significant Parameters of the Discriminant Analysis, as well as Subsequent Analysis Parameters for Task Comparison (Reading Aloud versus Spontaneous Speech in PwPD and control speakers (CON)) and DDK.
| Independent variable | Standardised coefficients | Discriminant loading (rank) | F | p |
|---|---|---|---|---|
| Reading Aloud | ||||
| %V | 0.425 | 0.856 (2) | 4.659 | 0.045 |
| Rate | 0.673 | 0.945 (1) | 5.677 | 0.028 |
| Group centroid (PwPD) | 0.564 | |||
| Group centroid (CON) | −0.564 | |||
| Wilkes lambda | 0.739 | 0.045 | ||
| (Canonical correlation)^2 | 0.261 | |||
| Spontaneous Speech | ||||
| %V | −0.746 | −0.407 (5) | 5.473 | 0.031 |
| ΔC | 0.867 | 0.693 (1) | 15.900 | 0.001 |
| rPVI-C | −0.473 | 0.513 (3) | 8.677 | 0.009 |
| Varco C | 0.720 | 0.533 (2) | 9.419 | 0.007 |
| rPVI-VC | −0.101 | 0.458 (4) | 6.936 | 0.017 |
| Group centroid (PwPD) | −1.290 | |||
| Group centroid (CON) | 1.286 | |||
| Wilkes lambda | 0.352 | 0.006 | ||
| (Canonical correlation)^2 | 0.648 | |||
| Task Comparison: Reading Aloud vs. Spontaneous Speech | ||||||
|---|---|---|---|---|---|---|
| PwPD |
CON |
|||||
| Variable | z | r | p | z | r | p |
| %V | −2.090 | 0.467 | .037 | −2.293 | 0.513 | .022 |
| ΔC | −0.255 | 0.057 | .799 | −2.497 | 0.558 | .013 |
| VarcoC | −0.833 | 0.186 | .386 | −2.293 | 0.513 | .022 |
| rPVI_VC | −1.682 | 0.376 | .093 | −2.191 | 0.490 | .028 |
| Rate | −0.833 | 0.186 | .386 | −2.090 | 0.467 | .037 |
| Group Comparison DDK Task: PwPD vs. CON | |||
|---|---|---|---|
| Variable | z | r | p |
| Mean | −2.721 | 0.608 | .007 |
| SD | −2.950 | 0.660 | .003 |
| CoV | −1.965 | 0.439 | .049 |