This repository contains supplemental materials for an EHPS 2019 symposium oral. - **[Presentation slides](https://osf.io/utw95/)** This wiki page contains the following supplemental content: - **Abstract** - **Links to extra information** ### Abstract To progress behavior change science, research syntheses are crucial. However, they are also costly, and unfortunately, often yield relatively weak conclusions because of poor reporting. Specifically, in the context of behavior change, the structural and causal assumptions underlying behavior change interventions are often poorly documented, and no convenient yet comprehensive format exists for reporting such assumptions. In this contribution, we introduce Acyclic Behavior Change Diagrams (ABCDs). ABCDs consist of two parts. First, there is a convention that allows specifying the assumptions most central to the dynamics of behavior change in a uniform, machine-readable manner. Second, there is a freely available tool to convert such an ABCD specification into a human-readable visualisation (the diagram), included in the open source R package ‘behaviorchange’. ABCD specifications are tables with seven columns, where each row represents one hypothesized causal chain. Each chain consists of a behavior change principle (BCP), for example a BCT, that leverages one or more evolutionary learning processes; the corresponding conditions for effectiveness; the practical application implementing the BCP; the sub-determinant that is targeted, such as a belief; the higher-level determinant that belief is a part of; the sub-behavior that is predicted by that determinant; and the ultimate target behavior. The ABCD is illustrated using an evidence-based intervention to promote hearing protection. ABCDs conveniently make important assumptions underlying behavior change interventions clear to editors and reviewers, but also help to retain an overview during intervention development or analysis. Simultaneously, because ABCD specifications are machine-readable, they maximize research synthesis efficiency. [repository: https://osf.io/4ta79] ### Links to extra information For more information, see the vignette about Acyclic Behavior Change Diagrams in the `behaviorchange` R package. This vignette is available at the [pkgdown website](https://r-packages.gitlab.io/behaviorchange/articles/abcd.html) or at the [CRAN repository]( https://r-packages.gitlab.io/behaviorchange/reference/abcd.html). There is also the main ABCD repository, which is available at https://osf.io/6qvb8/.