The effects of videotape instruction and feedback (videotherapy) on mothering behaviors were evaluated in this longitudinal study. In this study, 31 adolescents and their healthy infants were randomly assigned to experimental and control groups. All subjects were videotaped during structured mother-infant teaching episodes in their homes at 1 and 2 months postpartum. Experimental group subjects reviewed the videotaped 1-month teaching episode and received feedback from a specially trained professional nurse who emphasized positive aspects of maternal behavior. Instruction was individualized according to the mother's needs. Results of a repeated measures MONOVA revealed significant differences in the pattern of change over time between subjects in the experimental and control groups on a measure of actual maternal behaviors. Adolescents receiving videotape instruction and feedback obtained significantly higher maternal behavior scores at 1 and 2 months postpartum.