This study evaluated the use of the Prevent-Teach-Reinforce for Secondary (PTR-SEC) model as an individualized Tier 3 intervention within the School-Wide Positive Behavioral Interventions and Supports (SW-PBIS) in three high school classrooms. Three teaching staff (two teachers and one instructional aide) and three students with autism spectrum disorders participated in the study. The study examined the degree to which the classroom staff implemented the PTR intervention plan with fidelity and its impact on the students’ behaviors, using a multiple baseline across participants design. The results indicated that the teaching staff implemented the PTR intervention plan with high levels of fidelity, and their implementation of the intervention plan led to decreases in problem behavior and increases in replacement behavior across all three participating students with ASD. The PTR-SEC teams found the PTR-SEC intervention to be acceptable and satisfactory; all three staff expressed interest in continuing to implement the PTR intervention plan after completion of the study.

This study assessed the Prevent-Teach-Reinforce (PTR) model to determine its impact on problem and replacement behaviors of three children who are typically developing with behavioral challenges in a high-need elementary school setting. Specifically, this study evaluated the use of the PTR model as an intensive individualized Tier 3 intervention within a multi-tiered intervention system. In addition, the study examined the validity and usability of the Individualized Behavior Rating Scale Tool (IBRST), which was developed as a feasible daily progress monitoring tool in conjunction with the PTR model. Social validity and fidelity of intervention implementation were also assessed. A multiple baseline across participants was employed to evaluate the impact of implementation of the model on the children's behaviors. The results of the study indicated that the PTR model was effective in reducing problem behaviors and increasing the use of replacement behaviors for all three participants. In addition, the IBRST completed by the teachers was found to have a substantial correlation to data collected during direct observations.