Table 4.
Summary of linear regression models with M1 as the outcome, and Average Pitch, pitch Excursion, Rate of Speech, phonetic Label, Register, and age Group as predictors. Significance at the 0.05 level is signaled with ∗; 0.01 with ∗∗; 0.001 with ∗∗∗.
| Estimate | SE | t | |
|---|---|---|---|
| Model 1: R2=.518, F(4,7555)=2026, p<0.001 | |||
| Intercept | 7538.367 | 85.01 | 88.674∗∗∗ |
| Label (ʃ) | −3285.74 | 36.632 | −89.695∗∗∗ |
| Rate of speech | −66.153 | 11.120 | −5.949∗∗∗ |
| Average pitch | 2.173 | 0.26 | 8.359∗∗∗ |
| Excursion | −1.697 | 1.32 | −1.289 |
| Model 2: R2=.523, F(10,7549)=826.5, p<0.001 | |||
| Intercept | 7494.5884 | 89.442 | 83.79∗∗∗ |
| Label (ʃ) | −3120.836 | 73.036 | −42.73∗∗∗ |
| Group (4–6 months) | 123.252 | 59.006 | 2.09∗ |
| Register (IDS) | 125.376 | 53.392 | 2.35∗ |
| Rate of speech | −69.114 | 11.169 | −6.19∗∗∗ |
| Average pitch | 2.398 | 0.278 | 8.62∗∗∗ |
| Excursion | −2.011 | 1.311 | −1.53 |
| Label∗Group | −242.279 | 116.393 | −2.08∗ |
| Label∗Register | −324.913 | 95.586 | −3.4∗∗∗ |
| Group∗Register | −492.31 | 75.924 | −6.48∗∗∗ |
| Label∗Group∗Register | 504.924 | 151.817 | 3.33∗∗∗ |