TABLE 2.
Statistical analyses for age effects on overall intelligibility of interrupted sentences and the restoration benefit
| Noise condition | Source | Speech rate (SR) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Slow (SR=0.5) | Normal (SR=1) | Fast (SR=2) | |||||||||||
| df | MSE | F | p | df | MSE | F | p | df | MSE | F | p | ||
| Silent intervals | Between subjects | ||||||||||||
| AGE | 1, 22 | 232.43 | 14.61 | 0.001 | 1, 22 | 63.26 | 25.56 | 0.000 | 1, 22 | 115.49 | 37.80 | 0.000 | |
| Within subjects | |||||||||||||
| IR | 2.18, 47.92 | 114.13 | 63.44 | 0.000 | 2.67, 58.83 | 43.93 | 148.57 | 0.000 | 4, 88 | 70.74 | 90.37 | 0.000 | |
| IR × AGE | 2.18, 47.92 | 114.13 | 7.58 | 0.001 | 2.67, 58,83 | 43.93 | 10.72 | 0.000 | 4, 88 | 70.74 | 3.76 | 0.007 | |
| With filler noise | Between subjects | ||||||||||||
| AGE | 1, 22 | 115.86 | 5.34 | 0.031 | 1, 22 | 84.85 | 5.65 | 0.027 | 1, 22 | 151.33 | 22.97 | 0.000 | |
| Within subjects | |||||||||||||
| IR | 3, 66 | 52.76 | 38.62 | 0.000 | 4, 88 | 57.47 | 21.99 | 0.000 | 4, 88 | 49.73 | 188.85 | 0.000 | |
| IR × AGE | 3, 66 | 52.76 | 7.03 | 0.000 | 4, 88 | 57.47 | 1.62 | 0.177 | 4, 88 | 49.73 | 2.09 | 0.089 | |
| Restoration benefit | Between subjects | ||||||||||||
| AGE | 1, 22 | 277.15 | 4.02 | 0.057 | 1, 22 | 108.21 | 3.10 | 0.092 | 1, 22 | 85.79 | 0.59 | 0.450 | |
| Within subjects | |||||||||||||
| IR | 3, 66 | 140.57 | 13.37 | 0.000 | 4, 88 | 89.07 | 20.15 | 0.000 | 4, 88 | 114.14 | 144.18 | 0.000 | |
| IR × AGE | 3, 66 | 140.57 | 3.95 | 0.012 | 4, 88 | 89.07 | 2.40 | 0.056 | 4, 88 | 114.14 | 1.69 | 0.161 | |
Results shown from separate RM-ANOVAs conducted for intelligibility of interrupted sentences (with silent intervals or filler noise) and restoration benefit, for the three different speech rates (see Fig. 2). Bold p values indicate significance below alpha of 0.05. AGE and IR represent the main factors of age and interruption rate, respectively