Analysis of the effects of a short break contingent on completed work with a 10-year-old boy with autism and profound mental retardation found the 20-second break increased responding more than a positive reinforcer did, and the reinforcing effects of a 20-second break were affected by the availability of positive reinforcers during the break. (DB)

The study evaluated a reinforcement theory of stereotyped behavior with six autistic students (ages 9-16). Three students evidenced decreases in stereotypy and increases in responding in the presence of usual reinforcers, while the other three students required external suppression of stereotypy before increases in responding were shown.…

In response to a previous article proposing perceptual reinforcement of stereotyped movements in autistic and mentally retarded persons, it is argued that this theory fails to take into account biological findings and theory regarding pathological stereotyped acts. An alternative theory derived from neurological concepts is suggested. (Author/DB)

The authors respond to criticism of their paper proposing a perceptual reinforcement of stereotyped movements in autistic and mentally retarded persons. The alternative theory based on neurobiological factors is judged to be insufficiently detailed and inadequate in scope. (Author/DB)

Five children with autism participated in learning sessions involving trials of an acquisition task interspersed with trials of three maintenance tasks. Correct responses to acquisition tasks were continuously reinforced throughout all conditions; reinforcement for competent performance of maintenance tasks differed systematically. All children…

This study evaluated use of the interpolation of reinforcement effect, which combines intermittent (INT) and continuous reinforcement (CRF) schedules, with four young children with autism using a free-operant preparation. Results suggest that responding may be less resistant to extinction following interpolated CRF reinforcement than following INT…

We used functional communication training to teach Bob, a 10-year-old student with autism and severe language delays, to reject items by touching an icon. Our initial assessment revealed that Bob's behaviours serving a rejecting function consisted of pushing away, yelling, bear hugging-grabbing, and leaving. We used prompting, differential…

The study evaluated the effects of a time-efficient reinforcer assessment package with three preschoolers with autism. Systematic assessment of children's reinforcers for correct responding virtually eliminated nontargeted maladaptive behaviors, and yielded expected improvements in accuracy. (Author/DB)

An experimental analysis of imitation was conducted to examine the influence of response topography on generalization of imitation across three response types with four children (ages two to four) with autism. The study found that imitation generalized from reinforced training models to nonreinforced probe models within a response type but did not…

Level of spontaneous social initiating by three adult caregivers toward a youth with autism was studied during a program to increase the youth's level of social initiating. The youth's social initiations toward each adult were systematically reinforced. Frequency of spontaneous initiating toward the youth increased for each adult as the youth's…

A brief functional analysis indicated that the object mouthing of a young girl diagnosed with autism was maintained independent of social consequences. Separate and combined effects of response blocking and non-contingent reinforcement were then evaluated as treatments. Although both interventions were unsuccessful when implemented separately,…

Teachers of 2 children (ages 7 and 13) with autism were trained to conduct a descriptive analysis and a classroom experimental analysis of aberrant behavior. Each procedure identified negative reinforcement as a maintaining variable for aberrant behavior. Intervention based on the assessment was successfully implemented with one child and had…

A study of 4 youths (ages 11-18) with autism examined the effectiveness of teaching appropriate affective behavioral responses. Participants were described by teachers as having flat and inappropriate affect. Treatment consisted of modeling, prompting, and reinforcement. The combination of an error-correction procedure and contingent delivery of…