Research Projects

Current Areas of Investigation

Increasing Physical Activity

To maximize health and wellness, children with an autism spectrum disorder (ASD) can greatly benefit from daily physical activity. However, some children do not readily engage in physical activity. Therefore, it is important to identify methods for increasing physical activity among children with ASD. We are currently conducting two studies related to this goal. Study 1 will involve using heart rate measures to identify appropriate forms of physical activity to target during treatment. Study 2 will involve a treatment for increasing exercise that includes the following components alone or in combination: prompting, non-contingent reinforcement (NCR), and differential reinforcement. Additionally, a preference assessment of physical activities will be conducted before and after treatment to determine whether participants select one activity over another and if their selections remain consistent following treatment. The expected benefit of these studies is that appropriate forms of exercise can be identified and their levels of activity engagement increased to meet their individual fitness goals.

 

Assessment and Treatment of Problem Behavior during Dental Exams

Over the years, we have evaluated numerous approaches to helping our students more successfully tolerate and participate in dental exams.  To that end, a series of projects on graduated exposure to dental exams (“dental desensitization”) was initiated.  In these studies, we have evaluated the role of brief breaks during practice dental exams, the role of rewards during practice dental exams, the timing of practice dental exams, and the extent to which we can practice dental exam components in a more familiar and convenient environment.   Our results to date suggest that arranging breaks and rewards for cooperation during practice dental exams yields the greatest cooperation, and that frequent practice exams produce far greater improvements than occasional practice.  Further, our research suggests that practicing dental exam components in a simulated dental environment produces a significant improvement in our students’ performance during actual dental exams.

 

Persistence of Responding following DRA

Behavioral momentum theory research has demonstrated that differential reinforcement of alternative behavior (DRA) based interventions, while decreasing the rate of a target response (i.e., problem behavior), may in fact increase the persistence of target responses when reinforcement for the alternative response is disrupted. Previous studies have demonstrated that by training the alternative response in a context in which a target response has no history of reinforcement and then combining this context with one in which the target response has a history of reinforcement, the persistence increasing effects of DRA can be minimized when disruption occurs. One of our studies is aimed at demonstrating the effects of reinforcement histories on persistence of targeted responses across multiple phases of reinforcement and extinction conditions.