Table 1.
Participant Characteristics (Means and Standard Deviations)
| Fragile X Only | Fragile X + Autism | |||
|---|---|---|---|---|
| Female (N=13) | Male (N=13) | Female (N=2) | Male (N=22) | |
| Chronological Age | 12.35 (1.57) | 13.60 (1.85) | 11.04 (0.59) | 12.89 (1.71) |
| Language Age Equivalents | ||||
| Receptive Vocabulary1 | 10.65 (2.49) | 7.63 (2.68) | 7.41 (1.29) | 6.04 (2.16) |
| Receptive Grammar2 | 7.53 (2.59) | 4.60 (1.13) | 4.00 (0.00) | 4.27 (0.68) |
| Expressive Vocabulary3 | 9.43 (2.27) | 6.35 (2.24) | 6.50 (0.59) | 4.95 (1.57) |
| Expressive Syntax4 | 8.81 (1.96) | 5.385 (2.37) | 3.67 (2.12) | 3.56 (1.40) |
| Nonverbal Cognition | ||||
| IQ | 70.46 (14.33) | 48.38 (10.45) | 53.00 (7.07) | 42.96 (6.63) |
| Mean Age Equivalent | 8.00 (1.95) | 5.80 (1.06) | 5.51 (0.84) | 4.97 (0.88) |
| Maternal Age | 40.26 (3.58) | 42.24 (6.89) | 35.70 (4.51) | 42.43 (5.93) |
| Percentage of Mothers with College Degree or Higher | 46% | 54% | 50% | 48% |
1
Peabody Picture Vocabulary Test, Third Edition (PPVT; Dunn & Dunn, 1997)
2
Test for Reception of Grammar, Second Edition (TROG-2; Bishop, 2003)
3
Expressive Vocabulary Test, (EVT; Williams, 1997)
4
Comprehensive Assessment of Spoken Language, Syntax Construction Subtest (CASL; Carrow-Woolfolk, 1999)
5
N=12