A group of 10 infants diagnosed as having cerebral palsy or severe motor delays was administered pre/posttest assessments of both standardized and nonstandardized motor-evaluation instruments. Following 6 mo. of therapeutic intervention provided through neurodevelopmental treatment, the motoric gains of these infants were correlated with age, IQ, infant hours in treatment, hours of parental participation, and degree of involvement. Kendall's tau correlations showed a significant relationship between motoric progress and age, parental participation, and degree of involvement. The dilemma faced by habilitation professionals regarding whether or not to encourage parents to participate in therapeutic intervention programs is noted.