Children who had more extensive child care experience since infancy were rated by teachers and parents as having poorer work habits, peer relationships, and emotional health, and as being more difficult to discipline. When controlling for family social class, parents’ marital status, family size, number of family moves, child gender, childhood birth order, and current after school care, children’s extensive experience in infant care was the single best predictor of negative ratings by parents, teachers and peers, and of lower grades and standardized test scores