Comparison of 40 children with Down's syndrome and typically developing children (matched for mental age) found that the children with Down's syndrome appeared less engaged in a task, as indicated by shorter sequences of goal directed behavior and higher rates of toy rejection. They also displayed less causality pleasure with object exploration…

This study examined the effects of methylphenidate drug therapy and differential reinforcement on the disruptive behavior and task engagement of 3 children (ages 6 through 11) with mental retardation. Results indicated that both interventions were effective for two of the children. No evidence of an additive or synergistic effects of the two…

Three groups of elementary school children, rated on activity and distractibility, were given a visual search task with three levels of display load and tested twice in two conditions of stimulus visibility. Encoding deficit or data limitation did not account for the attentional performance of either hyperactive or somewhat hyperactive subjects.…

This study, involving a 10-year-old child with cerebral palsy and autism, found that the use of headphones resulted in an increase in on-task behavior whether stimuli were presented in an audiovisual mode, an audio-only mode, or a visual-only mode. Preference was for the auditory only or the mixed audiovisual stimuli. (DB)