Table 1.

Heritability estimates for the behavioral scores associated with the tasks.

Trait	h² ± SE (p)	Age	Age²	Sex	Age*Sex	Age²*Sex	Hispanic	Educ	h²cov%
		p-val
Language Accuracy	0.34 ± 0.06 (2.3·10−8)	0.49	0.75	0.01	0.96	0.22	0.97	1.2·10−7	7.2
Language RT	0.22 ± 0.07 (8.4·10−4)	0.44	0.91	0.69	0.85	0.95	0.71	0.04	0.5
Math Accuracy	0.4 ± 0.06 (1.6·10−10)	0.5	0.96	9.2·10−4	0.81	0.39	0.76	1.9·10−6	7.2
Math Difficulty Level	0.33 ± 0.07 (1.0·10−6)	0.53	0.17	0.02	0.61	0.05	0.42	8.7·10−8	7.9
Math Median RT	0.17 ± 0.07 (7.4·10−3)	0.6	0.41	0.78	0.82	0.69	0.26	0.01	1.1
Story Accuracy	0.18 ± 0.06 (1.6·10−3)	0.78	0.48	0.86	0.76	0.23	0.61	2.2·10−3	1.4
Story Difficulty Level	0.33 ± 0.07 (1.3·10−6)	0.66	0.43	0.81	0.44	0.28	0.91	0.11	0.0
Story Median RT	0.2 ± 0.07 (1.4·10−3)	0.41	0.63	0.39	0.59	0.68	0.45	0.39	0.0

Language accuracy and reaction time (RT) correspond to the average of the respective MATH and STORY variables. The p-values associated with the covariates related to age and sex, ethnic group and education level are also displayed.