%0 Journal Article %T Literacy as a Unidimensional Multilevel Construct: Validation, Sources of Influence, and Implications in a Longitudinal Study in Grades 1 to 4 %A Mehta, Paras D. %A Foorman, Barbara R. %A Branum-Martin, Lee %A Taylor, W. Patrick %J Scientific Studies of Reading %V 9 %N 2 %P 85-116 %@ 1532-799X %D 2005-04-01 %I Lawrence Erlbaum Associates, Inc. %~ DeepDyve