Table 2.
Descriptive statistics, N: mean (SD), for final adult sample across time points
| Time point 1 | Time point 2 | Time point 3 | Time point 4 | |
|---|---|---|---|---|
| Chronological age | 20: 3.9 (1.2) | 19: 11.7 (3.2) | 20: 18.3 (3.6) | 20: 26.6 (3.8) |
| Mental age | 20: 2.2 (1.2) | NA | 20: 8.1 (6.4) | NA |
| Language age | 20: 1.7 (0.9) | NA | 20: 5.0 (4.4) | NA |
| DQ | 20: 54.7 (15.5) | NA | 20: 44.8 (34.6) | NA |
| ESCS: | ||||
| IJA | 18: 8.7a (6.4) | NA | NA | NA |
| RJA | 18: .58b (.35) | NA | NA | NA |
| VABS raw scores | ||||
| Socialization | NA | 19: 59.5 (30.5) | 17: 69.6 (37.9) | 20: 67.3 (34.5) |
| Communication | NA | 19: 69.6 (40.9) | 17: 79.4 (46.0) | 20: 80.0 (45.5) |
| Daily living skills | NA | 19: 89.8 (36.9) | 17: 111.5 (43.2) | 20: 122.8 (43.6) |
| ADI-R algorithm | ||||
| Social | NA | 19: 16.4 (7.5) | 16: 11.1 (6.8) | 19: 13.3 (5.8) |
| Non-verbal communication | NA | 19: 4.3 (3.1) | 16: 3.6 (3.3) | 19: 4.0 (3.2) |
| Restricted and repetitive behaviors | NA | 19: 5.2 (2.0) | 16: 3.6 (2.1) | 19: 4.0 (2.4) |
aFrequency of initiations of joint attention over entire administration of ESCS
bProportion of responses to joint attention relative to presses for joint attention