There is an increasing awareness of the need for formal training in behavioral and social aspects of pediatrics. Housestaff response to a new training program in perinatal behavior was studied. The program, run by a psychiatrist and psychologist, was directed at the 7 house officers each month on the neonatal service. Instructional methods included integration of discussions of psychosocial issues on medical rounds in both the well and intensive care nurseries, weekly psychosocial rounds, didactic seminars, interviews with parents and house officers, neurobehavioral assessment exams, and guest speakers.Attitude questionnaires concerning the importance of the behavioral sciences and mental health professionals in medical care were obtained from housestaff (n=29) at the beginning and end of each month's rotation. Items were scored on a 5-point agreement scale (strongly agree-strongly disagree). Mean values were compared between beginning and end of the month and revealed a significant (p<0.025) improvement in attitudes toward the importance of the behavioral sciences and mental health professionals in medical training.It is concluded that a comprehensive training program in behavioral and psychosocial issues can be integrated into neonatology and enhance housestaff attitudes toward education in these areas.