title: Behavior and competence in the second year of life.
mesh_terms: D001519:Behavior; D002657:Child Development; D002675:Child, Preschool; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D007223:Infant; D007802:Language; D008297:Male; D002666:Psychology, Child; D012919:Social Behavior