Over the past 30 years, researchers have shown that various types of group contingency procedures can decrease problem behavior displayed by young children in academic settings. Recently, researchers have demonstrated that presession rules, within-session feedback, and interdependent group contingencies (i.e., contingently delivered tangible and edible items) increased appropriate behavior displayed by detained adolescents in a residential treatment facility. Nevertheless, it is possible that rules with feedback about rule violations could produce comparable outcomes. To address this question, we used a nonconcurrent multiple baseline design across classrooms to evaluate the extent to which rules, visual feedback (i.e., marks on a board denoting rule violations), and postsession feedback decreased problem behaviors in three classrooms within a residential detention facility. Results indicate that problem behavior decreased to less than 10% of observation intervals in each classroom. Results from a social validity measure indicate that the procedures and outcomes were acceptable to the respective classroom teachers.

Researchers used a conjugate preparation to evaluate how response force changed based on participants' preferences for visual stimuli. First, researchers used a verbal preference assessment to evaluate each participant's preference for viewing for five object categories of visual stimuli; this process identified high preference (HP) stimuli and low preference stimuli for most participants. Thereafter, researchers exposed each participant to the five stimulus categories in a randomized order while using a force dynamometer to measure their response force to increase visual clarity of each stimulus. Results indicate the majority of participants' HP stimuli corresponded to the stimulus category for which they exerted the highest mean force. These preliminary findings suggest conjugate preparations involving response force may provide another option for measuring the relative value of some stimulus events.