For the thirty-third year, the Research and Theory Division of the Association for Educational Communications and Technology (AECT) is sponsoring the publication of these Proceedings. Papers published in this volume were presented at the national AECT Convention in Anaheim, California. The Proceedings of AECT's Convention are published in two volumes. The papers contained in this volume deal primarily with research and development topics, and represent some of the most current thinking in educational communications and technology. Papers dealing with the practice of instructional technology, including instruction and training issues, are contained in the companion volume (Volume 2). (Individual papers contain references, figures, and tables.) [For Volume 2, see ED514647.]