Despite efforts to reduce and prevent incidents, bullying behaviors remain prevalent in schools, leading to poor outcomes for all involved. While the Olweus Bullying Prevention Program is one of the most extensively implemented school environment interventions in the USA, it has yet to yield consistently positive results across contexts,…

As evidence-based interventions are scaled, fidelity of implementation, and thus effectiveness, often wanes. Validated fidelity measures can improve researchers' ability to attribute outcomes to the intervention and help practitioners feel more confident in implementing the intervention as intended. We aim to provide a model for the validation of…

LifeSkills Training is the only program to prevent substance use disorder among adolescents that has evidence of effects on substance use outcomes from multiple randomized controlled trials. Evaluations have shown that the version for middle school students reduces their use of substances in high school, but these studies were conducted in the…

Using a randomized controlled trial, we investigated changes in both sexual harassment (SH) perpetration and victimization of 2104 middle school students in New York City who received divergent saturation and dosage levels of "Shifting Boundaries," an SH prevention program, which was represented by the length of the program. We assessed…

The leading cause of preventable disease, disability, and death in the United States is tobacco product use. The 2022 National Youth Tobacco Survey, which was completed in 2022, showed that the e-cigarette epidemic among youth continues to remain a public health threat. The survey revealed that over 2.5 million middle and high school students…

Universal and selective preventive interventions targeting youth behavioral problems have shown crossover effects on suicide risk, the second leading cause of death among youth. However, the mechanisms that explain this long-term unanticipated benefit are understudied and unclear. The current study examines the crossover effects of PROSPER, a…

E-cigarettes are a popular type of nicotine product among youth in the United States. Hispanic youth, one of the fastest growing populations in the United States, are second only to white youth for e-cigarette use. Analysis of the Parents' Resource Institute for Drug Education data was conducted to determine past 30-day e-cigarette use among…

Background: Educators in rural schools are uniquely situated to address youth mental health disparities, yet often face challenges in delivering mental health supports. This paper describes the process of adapting the evidence-based Coping Power program, a small group prevention program for youth with aggressive behavior problems, to be a…

Background: Educators in rural schools are uniquely situated to address youth mental health disparities, yet often face challenges in delivering mental health supports. This paper describes the process of adapting the evidence-based Coping Power program, a small group prevention program for youth with aggressive behavior problems, to be a…

This study examined the impact of a classroom-level component of The Inclusive Skill-building Learning Approach (ISLA), an instructional and restorative alternative to exclusionary discipline, on student behaviors and school discipline practices in middle schools. Intervention implementation, classroom observations, and all other data collection…

It should be noted that about a year after this researcher began work on this dissertation, he became seriously ill, greatly interfering with his ability to function. In 2019 he was diagnosed with Idiopathic Pulmonary Fibrosis, a terminal lung disease. As his physical condition continued to worsen, work on the dissertation came to practically a…

This study examined the program effectiveness of Health Rocks!, a youth substance use prevention program. Merging data from 128,544 youth participants in 21 states between 2009 and 2021, this study compared self-reported levels of knowledge, skills, and internal and external assets before and after the program. Youth reported significant increases…

This study examined the impact of a classroom-level component of The Inclusive Skill-building Learning Approach (ISLA), an instructional and restorative alternative to exclusionary discipline, on student behaviors and school discipline practices in middle schools. Intervention implementation, classroom observations, and all other data collection…

Background: Effective implementation strategies are needed to enhance the success of evidence-based prevention programs. The current study evaluates the effects of two implementation strategies on teachers' implementation of an evidenced-based HIV intervention. Methods: Using our 7-item pre-implementation school screening tool, we identified…

Large-scale, evidence-based interventions face challenges to program fidelity of implementation. We developed implementation strategies to support teachers implementing an evidence-based HIV prevention program in schools, Focus on Youth in The Caribbean (FOYC) and Caribbean Informed Parents and Children Together (CImPACT) in The Bahamas. We…