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Children with autism exhibit significant deficits in their ability to spontaneously imitate the play actions and descriptive gestures of others. Reciprocal imitation training (RIT) is a naturalistic imitation intervention designed to teach spontaneous imitation skills during play. This study assessed the effectiveness of parent-implemented RIT using a multiple-baseline design across three young children with autism and their mothers. After an initial baseline, mothers were taught to implement RIT techniques with their child twice a week for 10 weeks in a clinic setting. Two mothers were taught to use RIT to teach object imitation. The third mother was taught to use RIT to target both object and gesture imitation in a multiple-baseline design across behaviors. Generalization was assessed in the families’ homes at the end of treatment and a 1-month follow-up. Parents learned to use the intervention strategies and their children …