 Participation in this study will begin when the child participant is between 12 and 20 months old, and it will end when the child is 4 years old. Participants, who will include parents and their adopted child, will meet with the study researchers 3 times before receiving the training program intervention, twice in their home and once at the research site. During these visits, the background and medical history of the child participant will be reviewed. Participants will then be randomly assigned to receive 1 of 2 parent training programs: ABC-I or Developmental Education for Families DEF. Both programs will involve 10 weekly sessions, each lasting 60 to 90 minutes and occurring in the parents homes. The DEF training program will focus on enhancing the intellectual and language development of the child participant, but it will not train parents to pay attention to and interpret their childrens cues. The ABC-I training program will involve videotaping parents while they interact with their children, reviewing the videotapes, discussing strategies for interacting with children, and completing homework assignments. 