Objective: The purpose of this investigation was to examine the effectiveness of object-directed tasks on motor and verbal/vocal imitation behaviors in three young children with mild-to-moderate autism. Method: This investigation utilized a single-subject multiple baseline across participants (MBAP) design. Participants engaged in Structure-Elicited Imitation of adult-directed tasks. Participants were randomly assigned to a three-, six-, or nine-point-data baseline phase. Treatment sessions consisted of 10 sessions (10 imitation trials with four associated target acts) delivered once a day for 10 consecutive sessions. Imitation behaviors (motor and vocal/verbal) were assessed. Results: Results indicated that all three participants imitated more using object-directed acts during the treatment phase. Participant A showed the greatest change, with an absolute level of change of 35 on motor imitation and 40 on verbal/vocal imitation. Participant B’s level of change showed 33 on motor imitation and 31 on verbal/vocal imitation. Participant C’s level of change showed 30 on motor imitation and 30 on verbal/vocal imitation. Conclusion: Speech and language professionals can improve the motor and vocal skills of young children with ASD by developing intensive intervention procedures which utilize self-directed tasks. This treatment option is effective, simple and can be incorporated in treatment plans.
