Table 6.
Information transfer estimates for consonant features in 7 Nucleus and 10 Symbion cochlear implant users from Tye-Murray and Tyler (1989). Next to each feature in parentheses is the number of feature categories. Avg: average estimate per user, about N=420 and N=343 samples per matrix for Nucleus and Symbion users, respectively; Pool: estimate obtained from pooled data in one matrix with N=2940 and N=3430 samples for Nucleus and Symbion users, respectively; and diff: Avg-Pool. Without the small-sample bias, diff should be close to zero.
| (%) | Nucleus | Symbion | ||||
|---|---|---|---|---|---|---|
| Avg | Pool | diff | Avg | Pool | diff | |
| Voicing (2) | 22 | 22 | 0 | 49 | 43 | 6 |
| Nasality (2) | 24 | 23 | 1 | 56 | 51 | 5 |
| Frication (2) | 17 | 19 | −2 | 34 | 36 | −2 |
| Duration (2) | 14 | 12 | 2 | 33 | 31 | 2 |
| Place (4) | 18 | 13 | 5 | 20 | 11 | 9 |
| Envelope (4) | 29 | 24 | 5 | 54 | 46 | 8 |