First published in 1986. This monograph is based on a conference sponsored by the Human Learning and Behavior Branch of the National Institute of Child Health and Human Development, NIH. The meeting that was held at the Xerox Center in Leesburg, Virginia, in August 1983, brought together a group of leading researchers for the purpose of providing an overview of the emerging field of developmental behavioral pharmacology. More specifically, as is evidenced by the chapters in this volume, the intent was to put the field into historical perspective, render a working definition, and outline strategies and tactics for conducting behavioral pharmacological research in the developing organism.