Table 3.
Between-group comparisons for percent of gaze directed to caregiver and toy or joystick in AU sibs and LR infants.
| Phases | Periods | A. Mean (SD) of Percent Gaze to Caregiver | ||
|---|---|---|---|---|
| AU sibs | LR infants | p-values for between-group comparisons | ||
| Spontaneous | Baseline | 9.7 (10.3) | 12.3 (13.8) | p<0.001* |
| Acquisition | 8.4 (9.8) | 17.9 (14.9) | ||
| Extinction | 7.8 (9.2) | 13.4 (12.4) | ||
| Social | Baseline | 17.9 (16.9) | 18.1 (18.8) | p>0.1 |
| Acquisition | 19.8 (15.9) | 24.5 (19.5) | ||
| Extinction | 18.3 (18.3) | 19.5 (21.0) | ||
| Phases | Periods | B. Mean (SD) of Percent Gaze to Non-social Stimuli | ||
| AU sibs | LR infants | p-values for between-group comparisons | ||
| Spontaneous | Baseline | 79.5 (16.9) | 68.9 (15.9) | p<0.001* |
| Acquisition | 85.3 (12.0) | 67.4 (13.9) | ||
| Extinction | 66.1 (24.2) | 62.2 (19.6) | ||
| Social | Baseline | 70.9 (24.9) | 70.3 (21.8) | p>0.1 |
| Acquisition | 66.9 (18.9) | 59.9 (17.4) | ||
| Extinction | 54.9 (23.8) | 57.7 (22.6) | ||
*
p-value original, uncorrected, p-values that meet criteria for significance based on Bonferoni correction. The two groups were compared for each phase after collapsing data across the three periods.