Table 4.
Parameters Describing the Time Course of Competitor Fixations in the Cochlear Implant (CI) Group and the Age-Matched Normal Hearing (NH) Group
| Parameter | M (SD) | df | ta | pb | ||
|---|---|---|---|---|---|---|
| CI | NH | |||||
| Cohort | Onset slope (ms)c | 144 (27) | 122 (20) | 52 | 3.5 | .001 |
| Midpoint (ms) | 652 (72) | 603 (50) | 50 | 3.0 | .004 | |
| Peak height (p[fix])d,e | .18 (.05) | .18 (.05) | 53 | 0.1 | ||
| Offset slope (ms) | 249 (70) | 199 (54) | 52 | 7.0 | .005 | |
| Offset baseline (p[fix]) | .024 (.013) | .006 (.004) | 52 | 8.7 | <.001 | |
|
| ||||||
| Rhyme | Onset slope | 146 (55) | 107 (18) | 34 | 3.6 | .001 |
| Midpoint | 649 (140) | 563 (50) | 36 | 3.1 | .004 | |
| Peak height | .15 (.04) | .13 (.04) | 53 | 1.0 | ||
| Offset slope | 339 (309) | 226 (42) | 29 | 2.0 | .060 | |
| Offset baseline | .025 (.015) | .008 (.005) | 53 | 4.6 | <.001 | |
|
| ||||||
| Unrelated | Onset slope | 122 (29) | 110 (29) | 52 | 1.5 | |
| Midpoint | 610 (83) | 562 (62) | 51 | 2.5 | .017 | |
| Peak height | 0.138 (0.040) | 0.119 (0.035) | 50 | 1.1 | ||
| Offset slope | 274 (103) | 240 (58) | 45 | 1.5 | ||
| Offset baseline | 0.023 (0.012) | 0.006 (0.004) | 39 | 6.3 | < .001 | |
Notes:
a
T-tests assume unequal variances;
b
P values not shown are p > .1;
c
Milliseconds: the competitor onset and offset slope measurements correspond to the standard deviation (σ) or width of a Gaussian and are therefore represented in ms;
d
Proportion of total fixations;
e
Competitor peak height and offset baseline averages and standard deviations are not transformed so as to show meaningful measures. The statistics are performed on the transformed values.