This report presents the initial investigation of a longitudinal research effort to study various factors related to current development. The value of this study is its potential value in increasing the understanding of circumstances under which certain behaviors occur. In particular, this study has attempted to evaluate the usefulness of the…

This research report recounts the procedures, results, and recommendations of a research project in which more than 200 tenth-grade students in Florida were tested (1) to determine whether aptitude treatment interaction (ATI) effects on syntactic maturity and on knowledge of structural relationships occur after several months of instruction; (2)…