Table 1.
Participant demographics by diagnosis for both experiments
| Autistic disorder (n = 18) | Mixed DD (n = 18) | Typical development (n = 18) | CA-typical development (n = 18) | |
|---|---|---|---|---|
| Chronological age (months) | ||||
| M (SD) | 34.8 (3.8) | 35.5 (5.6) | 22.2a (4.5) | 32.6 (4.6) |
| Range | 26-41 | 24-45 | 15-35 | 25-43 |
| Nonverbal MA (months) | ||||
| M (SD) | 26.8 (6.2) | 24.8 (4.3) | 24.9 (5.3) | 36.0a (6.1) |
| Range | 19-47 | 19-35 | 18-41 | 25-47 |
| Verbal MA (months) | ||||
| M (SD) | 21.1c (6.2) | 22.1 (4.1) | 27.3b (5.9) | 40.1a (5.7) |
| Range | 13-37 | 14-30 | 19-43 | 27-53 |
| Overall MA (months) | ||||
| M (SD) | 23.9 (5.7) | 21.8 (5.2) | 22.1 (5.7) | 38.2a (5.1) |
| Range | 18-42 | 19-30 | 18-42 | 26-46 |
| Socioeconomic status | ||||
| M (SD) | 49.8 (13.5) | 51.8 (12.5) | 48.7 (14.0) | 50.0 (9.3) |
| Range | 22-66 | 15-66 | 22-66 | 35-66 |
| Gender | ||||
| Male | 15a | 10 | 8 | 6 |
| Female | 3 | 8 | 10 | 12 |
| Ethnicity | ||||
| European | 15 | 14 | 16 | 17 |
| African-American | 1 | 0 | 0 | 0 |
| Hispanic | 0 | 2 | 1 | 1 |
| Multiple ethnicities | 2 | 1 | 1 | 0 |
| Unreported | 0 | 1 | 0 | 0 |
a
Subscript indicates significant differences between groups. Same subscript indicates two groups are not significantly different