Susan B. Campbell, PhD, is Professor of Psychology at the University of Pittsburgh, where she has served as Chair of both the Clinical and Developmental Programs. She was the editor of theJournal of Abnormal Child Psychologyfrom 1999 to 2005, and she has served on numerous editorial boards and review committees. Dr. Campbell is currently the principal investigator at the Pittsburgh site of the 10-site National Institute of Child Health and Human Development Study of Early Child Care and Youth Development. She is coauthor (with E. Mark Cummings and Patrick T. Davies) ofDevelopmental Psychopathology and Family Process.