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Mean percentage of / f/ - / s/ and / v/ - / z/ confusions made by the HI children in the four age groups. The number is parentheses indicates the SD.
| Age Group (yrs) | Confusion | |
|---|---|---|
| / f/ - / s/ | /v / - / z/ | |
| 7–8 | 46% (30.0) | 25% (19.9) |
| 9–10 | 40% (22.1) | 12% (11.5) |
| 11–12 | 54% (34.8) | 20% (15.7) |
| 13–14 | 29% (21.7) | 11% (9.1) |
