Parent training on a daily basis has a positive effect on the number of verbal interactions between mother and infant. However, parent training did not seem to be a factor influencing the social-emotional and physical development activities of the teenage mothers in this study. Three groups of teenage mothers were observed with their infants in two different sessions. Group A participated in daily parent training classes. Group B received weekly parent training at home, and Group C received no parent training. The weekly training had no effect on the number of interactions in either the verbal or nonverbal areas. However, the factor that had the most effect over and above the training of the mother was her age. The older the teenage mother, the more verbal interactions she had with her child. (BP)