Table 1.

Descriptive statistics (Mean, SD, and Range) for participant groups

	FXS all participants (n = 51)	FXS + ASD only (n = 39)	Nonsyndromic ASD (n = 36)
Chronological age	7.52 (2.02; 4.06–10.63)	7.55 (2.08; 4.06–10.63)	7.43 (1.87; 4.02–10.99)
Nonverbal IQ SS	58.63 (13.51; 36–83)	56.38 (13.20; 36–83)	65.69 (12.32; 40–85)
Receptive vocabulary SS	67.92 (15.92; 25–99)	65.54 (15.92; 25–99)	60.81 (21.22; 20–99)
Expressive vocabulary SS	66.26 (16.25; 20–103)	63.55 (16.25; 20–103)	61.40 (23.56; 20–96)
Receptive grammar SS	59.84 (7.69; 55–83)	60.13 (8.32; 55–83)	60.09 (10.44; 55–99)
Expressive grammar SS	55.56 (11.07; 40–81)	53.92 (10.49; 40–81)	56.50 (14.19; 40–89)
Overall autism symptom severity	6.18 (2.09; 2–10)	6.56 (1.70; 4–10)	8.17 (1.54; 4–10)
Social Affective Symptom Severity	5.92 (2.30; 2–10)	6.23 (2.10; 2–10)	7.81 (1.69; 3–10)
Restricted and repetitive behavior symptom severity	7.18 (1.72; 1–10)	7.44 (1.48; 5–10)	8.31 (1.39; 5–10)