The effectiveness of a parent training program for promoting positive parent-child relationships was examined among families of 2-year-olds. Forty-six mothers and fathers and their toddlers were assigned to either an intervention or comparison group. Intervention group parents participated in a 10-week program that focused on principles for effectively interacting with their toddlers. Parents completed measures of parenting self-efficacy, depression, stress, and perceptions of their toddler's behaviors and were videotaped playing with their toddlers preintervention, postintervention, and 3 months following the intervention. Repeated measures ANOVAs showed that the parent training program led to significant increases in maternal self-efficacy, decreases in maternal stress, and improvements in the quality of mother-toddler interactions. No significant effects were found among fathers. Explanations for obtaining different outcomes for mothers and fathers are discussed and directions for future research are recommended. ©1995 John Wiley & Sons, Inc.