Manualized Assessment and Treatment Model of Challenging Behavior

During FCT, reinforcement will be discontinued for challenging behavior and only the alternative communication response will be reinforced. For participants with challenging behavior determined to be maintained by social-positive reinforcement (attention and/or tangible), the investigators also will typically recommend using a multiple schedule FCT (mult-FCT) to signal when reinforcement is available and to thin the schedule of reinforcement to render the treatment more practical for caregivers to implement. For participants with challenging behavior determined to be maintained by social-negative reinforcement (escape), the investigators will recommend using a chained schedule FCT (chained-FCT).

During NCR, the investigators will deliver the functional and competing reinforcers on time-based schedules and use multiple and chained schedules to signal when noncontingent reinforcement is available (similar to multiple- and chained-FCT).

The investigators will conduct a competing stimulus assessment (CSA) to identify items that produce at least an 80% reduction in challenging behavior when the participant is engaged with them. The investigators will evaluate conditions in which participants have free access to the item(s), when engagement with the item(s) is prompted, and when challenging behavior is physically blocked. Treatment will include one or more of the following components: non-contingent reinforcement informed by the CSA, reinforcing adaptive behavior, and blocking challenging behavior. The investigators will also use multiple and chained schedules to thin the reinforcement schedules and increase the practicality of the this treatment. The ending duration of the S-delta component will be based on input from caregivers and the participant's school personnel.

Caregivers of participants with mild challenging behavior will receive training on a variety of topics, such as prevention strategies and functional communication training, throughout implementation of the RUBI protocol.