Table 4.

Cognitive and behavioral differences between FXS and ASD participants. Asterisks represent statistically significant differences at the 5% level

	FXS	ASD
NVIQ
Mean ± SD	62.28 ± 22.52	95.90 ± 18.27
ANOVA	F(1,94) = 74.57, p < .001*
ABC-C-FX scores
Composite score (mean ± SD)	51.84 ± 36.28	32.14 ± 22.51
ANOVA	F(1,91) = 10.12, p = .002*
Irritability subscale (mean ± SD)	16.09 ± 15.20	9.65 ± 10.50
ANOVA	F(1,93) = 5.82, p = .018*
Lethargy subscale (mean ± SD)	8.44 ± 7.18	4.88 ± 3.84
ANOVA	F(1,92) = 9.22, p = .003*
Stereotypy subscale (mean ± SD)	5.96 ± 5.40	3.20 ± 2.94
ANOVA	F(1,94) = 9.74, p = .002*
Hyperactivity subscale (mean ± SD)	11.48 ± 7.75	7.84 ± 6.80
ANOVA	F(1,93) = 5.95, p = .017*
Inappropriate speech subscale (mean ± SD)	5.26 ± 3.64	3.06 ± 2.95
ANOVA	F(1,93) = 10.53, p = .002*
Social withdrawal (mean ± SD)	3.66 ± 3.19	3.51 ± 3.39
ANOVA	F(1,94) = .05, p = .825
Vineland-III scores
Adaptative Behavior Composite score (mean ± SD)	51.29 ± 23.22	71.47 ± 11.59
ANOVA	F(1,78) = 26.66, p < .001*
Communication domain (mean ± SD)	43.68 ± 21.49	71.08 ± 15.36
ANOVA	F(1,78) = 44.16, p < .001*
Daily Living Skills domain (mean ± SD)	58.74 ± 29.31	75.39 ± 13.17
ANOVA	F(1,78) = 12.03, p < .001*
Socialization domain (mean ± SD)	54.48 ± 23.90	72.02 ± 15.80
ANOVA	F(1,78) = 15.64, p < .001*