Print Email Facebook Twitter Effects of Implementing Multiple Components in a School-Wide Antibullying Program Title Effects of Implementing Multiple Components in a School-Wide Antibullying Program: A Randomized Controlled Trial in Elementary Schools Author van Verseveld, M.D.A. Fekkes, M. Fukkink, R.G. Oostdam, R.J. Publication year 2021 Abstract This study investigates the effectiveness of the PRIMA antibullying program for elementary education using a cluster-randomized trial with two experimental conditions (with and without student lessons) and a control group. Students of 31 schools participated in the study (N = 3,135; Mage = 10 years). Multilevel regression analyses demonstrated positive effects of the program on peer-reported victimization and reinforcing behavior. Implementing multiple program components was related to stronger program effects. The results provide partial experimental evidence for the beneficial effects of combining student lessons and teacher training in antibullying programs. Future experimental research is needed to investigate other approaches that reduce not only peer-reported victimization, but also self-perceived bullying and victimization. © 2021 Society for Research in Child Development Subject BullyingControlled studyHumanHuman experimentMajor clinical studyPrimary schoolRandomized controlled trialTeacher training To reference this document use: http://resolver.tudelft.nl/uuid:31726c69-4bda-4c1f-b9c4-94bbe0df29f2 DOI https://doi.org/10.1111/cdev.13529 TNO identifier 957630 Source Child Development, 92 (92), 1605-1623 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.