What is the best way to evaluate whether an intervention works?

Orthodox ‘evidence-based’ evaluation methods review certain kinds of studies (especially randomised trials) but exclude other relevant evidence (such as mechanistic studies and views of stakeholders). This project will apply an emerging philosophical theory of causal enquiry, Evidential Pluralism, to provide systematic foundations for a broader approach to evidence review—one that includes a diverse range of evidence from across disciplines. This approach promises better informed and more inclusive evaluations. A new review of the effectiveness of face-mask mandates will help to test the approach.

Funding grant: UKRI interdisciplinary scheme (2025-2027).

Team:
Trish Greenhalgh (co-leader), Department of Primary Care Health Sciences, University of Oxford. Rebecca Helm (co-leader), Law School, University of Exeter.
Luana Poliseli Ramos (Research Associate), Philosophy Department, University of Manchester. Sahanika Ratnayake (Research Associate), Philosophy Department, University of Manchester.
Jon Williamson (PI), Philosophy Department, University of Manchester.