Table 4.
Results of repeated-measures ANOVAs comparing the Tone vs. Chirp and Chirp vs. Reversed Chirp vs. Noise Chirp stimuli.
| Task | Effect type | Source | Degrees of freedom | F | p-value | Partial eta squared |
|---|---|---|---|---|---|---|
| Single stimulus detection (Tone vs. Chirp) | Within-subjects | Stimulus | 1,76 | 12.422 | 0.001 | 0.140 |
| Stimulus × Age group | 1,76 | 0.811 | 0.371 | 0.011 | ||
| Between-subjects | Age group | 1,76 | 33.740 | 0.000 | 0.307 | |
| Monaural gap discrimination (Tone vs. Chirp) | Within-subjects | Stimulus | 1,76 | 87.568 | 0.000 | 0.535 |
| Stimulus × Age group | 1,76 | 2.034 | 0.158 | 0.026 | ||
| Between-subjects | Age group | 1,76 | 25.793 | 0.000 | 0.253 | |
| Monaural gap discrimination (Chirp vs. Reversed chirp vs. Noise chirp) | Within-subjects | Stimulus | 2,126 | 7.443 | 0.001 | 0.106 |
| Stimulus × Age group | 2,126 | 0.233 | 0.793 | 0.004 | ||
| Between-subjects | Age group | 1,63 | 12.979 | 0.001 | 0.171 | |
| Bilateral gap discrimination (Tone vs. Chirp) | Within-subjects | Stimulus | 1,76 | 1.599 | 0.210 | 0.021 |
| Stimulus × Age group | 1,76 | 0.515 | 0.475 | 0.007 | ||
| Between-subjects | Age group | 1,76 | 10.061 | 0.002 | 0.117 | |
| Binaural ITD discrimination (Tone vs. Chirp) | Within-subjects | Stimulus | 1,76 | 96.198 | 0.000 | 0.559 |
| Stimulus × Age group | 1,76 | 0.809 | 0.371 | 0.011 | ||
| Between-subjects | Age group | 1,76 | 11.358 | 0.001 | 0.130 | |
| Binaural ITD discrimination (Chirp vs. Reversed chirp vs. Noise chirp) | Within-subjects | Stimulus | 2,126 | 0.391 | 0.677 | 0.006 |
| Stimulus × Age group | 2,126 | 0.423 | 0.656 | 0.007 | ||
| Between-subjects | Age group | 1,63 | 5.859 | 0.018 | 0.085 |
Greenhouse-Geisser corrections for violations of the assumption of sphericity were conducted for the effect of stimulus, but the results were unchanged. Proportion of variance explained is estimated by the value of partial eta squared. Statistically significant sources of variance are indicated in bold.