Table 2.
Mean (SD) for accuracy (Acc) and reaction time (RT) in TD and LT children at 18 months
| Language Groupa |
||||
|---|---|---|---|---|
| Full Sample (n=82) |
TD (n=46) |
LT (n=36) |
t(80) | |
| Acc: All trialsb | .63 (.09) | .66 (.08) | .61 (.10) | 2.1, p < .04, d = 0.6 |
| Acc: Target understoodb | .64 (.09) | .66 (.08) | .62 (.10) | 1.8, p < .08, d = 0.4 |
| RT: All trialsc | 822.6 (179.1) | 789.1 (157.8) | 865.4 (197.0) | 2.0, p < .05, d = 0.4 |
| RT: Target understoodc | 811.8 (174.9) | 785.9 (155.3) | 844.9 (194.4) | 1.5, p < .13, d = 0.3 |
a
TD and LT groups based on percentile for words produced on the CDI: Words & Sentences at 18 months (see text).
b
Mean proportion looking to the target picture out of looking to the target and distracter picture from 300 to 1800 msec from noun onset on distracter- and target-initial trials, computed over all trials and target word understood trials (see text).
c
Mean latency to initiate an eye-movement (in msec) from the distracter to the target picture on distracter-initial trials, compute over all trials and target word understood trials (see text).