We tested the effects of conditioning 3-dimensional objects as reinforcers on imitation and match to sample responses of young children with autism. Three children between the ages of 2 and 4.8 years who attended a center-based Early Intervention or preschool program participated in the study. The 3-dimensional object conditioning procedure involved the participants visually tracking preferred and nonpreferred items that were placed under transparent and opaque cups. The cups were then rotated a set number of times per phase. Results showed that for all 3 participants, the 3-dimensional conditioning procedure was functionally related to increases in generalized 3-dimensional matching and object use imitation. Decreases in instructional trials to criterion were noted for 2 of the 3 participants as well. The results are discussed in terms of observing and attending and the effects on reliable assessment and programmatic planning.
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