Table 1. Group means for measures of age, SES (mother's and father's years of education), non-verbal intelligence (TONI-4), autism symptoms (CARS-2), risk of developing ADHD (ADHD Index from Conner's Scale), and language skills (CELF-4).

Group	Age (years, months)	Mother's Education (years)	Father's Education (years)	TONI-4	CARS-2	ADHD Index	CELF-4
							CFD	FS	RS	CLS
7-8 year olds	8;2	17.6 (0.8)	17.5 (0.9)	110.3 (1.7)	15.4 (0.2)	47.7	12.8 (0.4)	13 (0.4)	12.2 (0.6)	114.1 (1.4)
10-11 year olds	11;2	15.5 (0.6)	15.3 (0.7)	105.5 (2.7)	15 (0)	46.1	10.7 (0.6)	12.6 (0.4)	11.2 (0.6)	110.1 (2)
p		0.048	0.069	0.15	0.082	0.417	0.001	0.439	0.247	0.124

Note. Numbers for TONI-4, CARS-2, the ADHD Index, and CELF-4 represent standardized scores. Numbers in parentheses are standard errors of the mean. P-values reflect a group comparison based on a one-way ANOVA.TONI = Test of Non-Verbal Intelligence; CARS = Childhood Autism Rating Scale; CFD = Concepts and Following Directions; FS = Formulated Sentences; RS = Recalling Sentences; CLS = Core Language Score