We evaluated the discrimination acquisition of individuals with developmental disabilities under immediate and delayed reinforcement. In Experiment 1, discrimination between two alternatives was examined when reinforcement was immediate or delayed by 20 s, 30 s, or 40 s. In Experiment 2, discrimination between 2 alternatives was compared across an…

We manipulated relative reinforcement for problem behavior and appropriate behavior using differential reinforcement of alternative behavior (DRA) without an extinction component. Seven children with developmental disabilities participated. We manipulated duration (Experiment 1), quality (Experiment 2), delay (Experiment 3), or a combination of…

The applicability of two reinforcer assessment procedures to children with developmental disabilities and visual impairments was evaluated. Greater differentiation between stimuli occurred with a choice procedure than with a preference procedure. Measurement of compliance and responding rate in adaptive skill training confirmed that the choice…

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…