Originally published in 1979, this volume contains chapters prepared following a conference at SUNY- Binghamton in 1977. The conference was the outcome of exciting new developments that had occurred in the ontogeny of learning and memory at the time, as well as a long-standing friendship between the editors. Many changes had taken place in the years leading up to this volume and there were now many more researchers active in the field. This volume reflected the rapidly changing state of this research area at the time and includes early contributions from researchers now well established in the field.