The Dimensionality of Language Ability in Young Children
purpose study empirically examine dimensionality language ability young children 48 years prekindergarten third grade n 915 theorizing measures vocabulary grammar ability represent unitary trait across ages determine whether discourse skills represent additional source variance language ability results demonstrated emergent dimensionality language across development distinct factors vocabulary grammar discourse skills third grade confirming discourse skills important source variance childrens language ability represent important additional dimension accounted studying growth language skills course childhood