Table 3.
Reliability data for acoustic measures: r-values, mean differences, and standard deviations (SDs) between original and re–measured data
| Intra-rater reliability | ||||
|---|---|---|---|---|
| Task | Measure | r | Mean difference | SD of difference |
| RN | Word duration | .993 | 1 ms | 20 ms |
| RN | Fl | .946 | 7 Hz | 53 Hz |
| RN | F2 | .978 | 22 Hz | 85 Hz |
| DDK | VOT | .941 | < 1 ms | 7 ms |
| DDK | Trisyllable durations | .992 | 3 ms | 16 ms |
| Inter-rater reliability | ||||
|---|---|---|---|---|
| Task | Measure | r | Mean difference | SD of difference |
| RN | Word duration | .874 | 6 ms | 63 ms |
| RN | F1 | .876 | 5 Hz | 47 Hz |
| RN | F2 | .957 | 11 Hz | 67 Hz |
| DDK | VOT | .967 | < 1ms | 5 ms |
| DDK | Trisyllable durations | .994 | 1 ms | 15 ms |
Note: All correlations significant at p < 0.01.