Adolescent 1 Analysis of Variance Child Child, Preschool 1 Comprehension 1 Female Florida 1 Gene-Environment Interaction 1 Humans 1 Longitudinal Studies 1 Male 1 Reading 1 Twins 1 adolescent 1 analysis of variance 1 child 1 comprehension 1 decomposition 1 dizygotic twins 1 female 1 genotype environment interaction 1 human 1 kindergarten 1 literacy longitudinal study 1 major clinical study 1 male 1 preschool child 1 reading 1 twin study 1