An alternating treatments design compared one condition in which a child with autism was allowed to engage in stereotypy freely prior to the intervention (abolishing operation component) to a second condition without the free-access period. Levels of stereotypy and problem behavior were lower and levels of functional play were higher in the…

The present study evaluated the effects of classwide satiation and embedded reinforcement procedures on preschoolers' activity preferences during scheduled free-play periods. The goal of the study was to increase time allocation to originally nonpreferred, but important, activities (instructional zone, library, and science) while continuing to…

The relative reinforcing value of toys was assessed in the absence of, and immediately following, participant observation of a peer manipulating one of the materials toys. Preference assessments were used to identify preference hierarchies. Reinforcer assessments were conducted with the most high-preferred preference item, a low-preference the…

The role of sensory reinforcement was examined in programing multiple treatment gains in self-stimulation and spontaneous play for four developmentally disabled children (eight to ten years old). (Author/SBH)

Two children (ages four and five) with mild developmental delays and no appropriate toy play were trained individually on one topography for each toy. Previously reinforced topographies of toy play were then placed on extinction, resulting in the induction of untrained topographies. (Author/DB)

Findings of the three experiments indicated that normal children can successfully teach social responses (i.e., delayed imitation, cooperative play, and verbalization of positive comments) to withdrawn mentally retarded peers (8 to 13 years old). Effects generalized across stimulus and response conditions, while the levels of responding were…

Following inconclusive functional analyses of problem behaviors in 3 children (ages 3-4) with severe disabilities, interventions based on environmental enrichment were implemented. For all subjects, environmental enrichment decreased aberrant behavior if preferred stimuli were used. Explicit reinforcement of appropriate play behavior was required…

The behavior of four boys who were referred for oppositional, rule violating, and aggressive behaviors was assessed by direct observation and parent reports. Changing contract behavior to solitary toy play resulted in reduced oppositional behavior during the observation sessions, fewer reports from the parents of low-rate problem behaviors, and…