Table 1.
Group characteristics.
| ASD-O | FXS-ASD | FXS-O | DS | TD | |
|---|---|---|---|---|---|
| N = 28 | N = 40 | N = 21 | N = 21 | N = 20 | |
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |
| (Range) | (Range) | (Range) | (Range) | (Range) | |
| Chronological age | 9.21 (2.22) | 10.55 (2.42) | 9.61 (3.03) | 10.86 (2.07) | 4.84 (1.34) |
| (4.16–12.74) | (6.58–15.07) | (6.06–14.98) | (6.81–14.86) | (3.23–8.78) | |
| Non-verbal mental age1 | 5.88 (1.32) | 5.02 (0.49) | 5.44 (0.95) | 5.33 (0.83) | 5.49 (1.45) |
| (3.92–10.50) | (3.50–6.00) | (4.42–8.25) | (4.33–8.25) | (3.58–9.17) | |
| Expressive vocabulary age2 | 5.62 (1.59) | 4.99 (0.99) | 5.42 (1.56) | 5.41 (1.30) | 5.87 (2.14) |
| (3.42–8.92) | (2.67–7.25) | (2.75–9.25) | (3.58–8.58) | (2.92–12.33) | |
| Receptive vocabulary age3 | 5.76 (1.81) | 5.67 (1.39) | 6.36 (2.55) | 5.18 (1.44) | 6.12 (2.01) |
| (3.08–10.00) | (2.42–8.83) | (3.42–13.83) | (2.42–7.50) | (2.17–11.58) | |
| Mean length of utterance (morphemes) | 4.18 (0.94) | 3.49 (0.69) | 3.98 (0.74) | 3.14 (0.75) | 4.87 (0.54) |
| (2.22–5.49) | (2.18–4.88) | (2.27–4.74) | (1.76–4.76) | (4.12–6.05) | |
1Leiter-R, age equivalent in years.
2Expressive Vocabulary Test (EVT), age equivalent in years.
3Peabody Picture Vocabulary Test – 3rd Edition (PPVT-III), age equivalent in years.