This study investigated the extent to which trained nonprofessional personnel under nursing supervision could effectively conduct health screening of Head Start children. Results of screening by nonprofessionals were compared with results of the traditional pediatric examinations. The nonprofessionals were trained by a pediatrician and a psychologist and used the following instruments to facilitate screening: parent interviews, physical observation forms, a revised Denver Developmental Screening Test, the Ammons Quick Test, and a revised Willoughby-Haggerty Behavior Rating Scale. There was a positive correlation between the results of pediatric examinations and those of the nonprofessionals. Their referrals for intellectual and developmental problems also reflected a low but positive correlation with those of psychologists. The correlation between pediatricians' and psychologists' referrals was even lower. These results suggest that with more training, nonprofessionals could be useful in health screening under proper supervision and thus provide a valuable service to areas short of medical and nursing personnel. (Author/WD)