tained collaboration between the Department of Psychiatry and Behavioral Sciences at George Washington and the Psychiatric In­ stitute in planning the conference and the present volume. A committee was established to plan the conference. It con­ sisted of Peter Steinglass, Associate Professor of Psychiatry, and George Cohn, Professor of Child Health and Development, both of George Washington, and Margaret Garrett, a member of the psychiatric staff at the Psychiatric Institute. The committee was jointly chaired by the editors of this volume. The committee re­ ceived indispensable assistance from members of the administra­ tive staff of the Psychiatric Institute: Al Bruce, Carol Klein, and Miriam Mathura. Margaret Schnellinger of the Center for Family Research, George Washington University, was also very helpful in all phases of planning the conference.