Table 5.
Proportion of reduction in error and base error rates for each age group.
| Young | Old | Adult | Y-Aa | Y-O | O-A | |
|---|---|---|---|---|---|---|
| p | 0.53 | 0.47 | 0.38 | 0.40b | 0.14 | 0.23 |
| b | 0.65 | 0.54 | 0.50 | 0.31 | 0.20 | 0.09 |
| t | 0.27 | 0.26 | 0.24 | 0.12 | 0.06 | 0.06 |
| d | 0.32 | 0.29 | 0.27 | 0.20 | 0.10 | 0.09 |
| k | 0.30 | 0.24 | 0.19 | 0.59 | 0.25 | 0.28 |
| g | 0.32 | 0.25 | 0.20 | 0.59 | 0.27 | 0.26 |
| m | 0.52 | 0.46 | 0.36 | 0.45 | 0.13 | 0.28 |
| n | 0.43 | 0.38 | 0.30 | 0.46 | 0.14 | 0.27 |
| ŋ | 0.66 | 0.60 | 0.51 | 0.30 | 0.10 | 0.19 |
| ʧ | 0.32 | 0.29 | 0.24 | 0.33 | 0.12 | 0.20 |
| ʤ | 0.31 | 0.30 | 0.29 | 0.06 | 0.05 | 0.01 |
| h | 0.73 | 0.67 | 0.65 | 0.12 | 0.09 | 0.03 |
| f | 0.47 | 0.41 | 0.40 | 0.17 | 0.16 | 0.01 |
| v | 0.47 | 0.37 | 0.34 | 0.40 | 0.29 | 0.08 |
| s | 0.41 | 0.36 | 0.34 | 0.21 | 0.16 | 0.05 |
| z | 0.37 | 0.33 | 0.30 | 0.23 | 0.13 | 0.08 |
| θ | 0.69 | 0.68 | 0.64 | 0.06 | 0.01 | 0.05 |
| ð | 0.64 | 0.68 | 0.68 | −0.06 | −0.06 | 0.00 |
| ʃ | 0.35 | 0.30 | 0.25 | 0.39 | 0.17 | 0.19 |
| ʒ | 0.44 | 0.31 | 0.38 | 0.14 | 0.41 | −0.19 |
Y = Young children, O = Older children, A = Adults.
PRE values in bold represent a difference that exceeds the 0.10 criterion.