CONTENTS INTRODUCTION . . . . . . . . . . ... ........ ... . .. . . .. . . . ... . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265 EMERGENT THEMES IN THEORY AND RESEARCH ON ADOLESCENCE...... ............ 267 Models of Adolescent Development: Transactional, Interdisciplinary, and Contex...