Objectives: Participants will learn about the principles of logic modelling in evidence syntheses across disciplines, and gain hands-on experience with developing a logic model for their own review.

Description: Logic models are increasingly being used in evidence syntheses, in particular in reviews or HTAs of complex interventions in health, education and social welfare. Logic models can help conceptualise interventions within systems by depicting intervention components and the relationships between them, making theories of change explicit, and displaying interactions between the intervention and the context within which it is implemented. A logic model can also be a helpful mechanism for making transparent assumptions among researchers, providing a basis for exploration of heterogeneity and making results more accessible to a range of decision makers. In essence, logic models provide a framework to support the entire systematic review process from scoping the review, defining and conducting the review and making the review relevant to policy and practice. The workshop will give an overview of three main approaches to logic modelling – a priori, staged and iterative – and present worked examples from Cochrane, Campbell, the EPPI Centre and HTA. Using templates for system-based and process-orientated logic models, working alone or in small groups and supported by several facilitators, participants will then develop and present a draft logic model for their own review.