The effect of principal attention contingent upon tem on-task performance was examined in an unruly fourth-grade class. Principal attention was found to be a strong reinforcer in both experimental conditions, but percentage of on-task behavior during team consequences was higher than during individual consequences. (Author)

This study reports a successful classroom intervention program which was designed to curb encopresis. It used positive consequences in combination with negative consequences, rather than negative consequences alone. Also it utilized a reversal strategy to evalulate the efficacy of the treatment variables. (Author)