Table 2.

Demographics for each group

	MAA (n = 21)	ALC (n = 13)	CON (n = 27)	Group differences
Age	9.66 (1.85)	11.15 (2.34)	10.15 (2.90)	None
Female/male	9/12	5/8	16/11	None
Handedness [right (100) to left (−100)]	60.45 (47.99)	55.83 (59.76)	70.63 (28.15)	None
Family annual income	7.714 (1.90)	6.77 (2.42)	6.96 (2.72)	None
FSIQ	97.81 (12.77), n = 21	89.50 (13.53), n = 12	110.32 (16.73), n = 25	F (2,55) = 9.08, p < 0.001;CON > ALC, t = −4.05,p < 0.001; CON > MAA,t = 2.87, p = 0.006

Values expressed as mean (SD). Family annual income is a categorical variable: 1, <$5000; 2, $5000–9999; 3, $10,000–19,999; 4, $20,000–29,999; 5, $30,000–39,999; 6, $40,000–49,999; 7, $50,000–74,999; 8, $75,000–100,000; 9, >$100,000.