Impact Evaluation of Complementarities Between Positive Behavioral Interventions and Supports (PBIS) and Restorative Justice, Maryland, 2018-2021

Across the United States (U.S.), school districts have grappled with how to create safe community- and achievement-oriented schools and how to ensure the necessary discipline is applied transparently, fairly, and without bias. Two programs that many schools have turned to in order to achieve these goals are Schoolwide Positive Behavioral Interventions and Supports (PBIS) and Restorative Justice (RJ). PBIS is an evidence-driven schoolwide behavioral management approach that aims to outline clear expectations for students and to cultivate shared norms and practices across classrooms and school spaces. PBIS has become a popular approach in schools and districts: as of 2020; over 19,000 schools in the U.S. have implemented PBIS.

A second program, Restorative Justice (RJ), has grown in popularity in recent years. RJ typically focuses on restorative relationship building between affected parties, peaceful reconciliation, and non-punitive approaches to rectifying harm, using a structured circle discussion format. RJ schools use both community circles, designed to build a safe space for students and staff to share and listen to each other, and restorative circles, designed to share perspectives on and redress a behavioral issue.

Working with a large school district in a mid-Atlantic state, researchers set out to test whether these two programs substitute for or complement each other. In partnership with the school district researchers conducted two separate school-level randomized controlled trials (RCTs). The first RCT (RCT 1) sought to uncover the marginal impact of RJ by adding the program to a set of randomly selected schools that were already implementing PBIS. The second RCT (RCT 2) was designed to discover the impact of introducing both programs together into schools that had neither program at baseline. Researchers conducted student and staff surveys to collect measures of school climate, teacher logs to record program implementation, and researchers also received administrative data from the district on student test scores, teacher and student absences, student disciplinary infractions, and school costs.

There is growing evidence of the effectiveness of each of these programs in isolation. A recent meta-analysis of 32 experimental and quasi-experimental impact studies of PBIS found that PBIS reduced disciplinary exclusions and problem behavior and increased academic achievement. The findings were statistically significant and showed small to medium effect sizes. Individual studies have found that PBIS reduces the use of office disciplinary referrals and other exclusionary disciplinary measures (including the use of in-school and out-of-school suspensions), while improving student behavior and attitudes across school levels. Individual studies show variable--some statistically significant and some null--impacts on academic outcomes.

The empirical evidence on the effect of RJ in U.S. schools is more limited, with little rigorous casual evidence published to date. Based on patterns across rigorous and non-rigorous research, restorative justice is associated with decreases in suspension rates and disciplinary disparities, improved student behavior, and improved school climate and relationships.