Abstract
In view of the discrepancy between anti-bullying strategies used in organisations and knowledge of bullying that is grounded in the international scholarly literature, the aim of this study is to implement and evaluate an intervention program specifically targeting the root causes of workplace bullying by identifying, assessing, and changing the contexts of people management in which bullying arises. The present research describes the development, procedures, and co-design principles underpinning a primary intervention that is focused on improving organisational risk conditions linked to workplace bullying. Our study evaluates the effectiveness of this intervention using deductive and abductive approaches and multi-source data. Specifically, our quantitative analysis examines changes in job demands and resources as a central mechanism underlying how the intervention takes effect and provides support for job demands as a mediator. Our qualitative analysis expands the inquiry by identifying additional mechanisms that form the foundations of effective change and those that drive change execution. The results of the intervention study highlight the opportunity to prevent workplace bullying through organisational-level interventions and reveal success factors, underlying mechanisms, and key principles.