Designing Participatory Technology Assessments: A Reflexive Method for Advancing the Public Role in Science Policy Decision-making

•Few methods exist to operationalize democratic science policy governance frameworks.•We offer one approach via a participatory technology assessment (pTA) method.•Our pTA method has three phases: framing, deliberation, and results integration.•We share case studies of projects that catalyzed innovations on our method's design.•We conclude that diverse actors can use and adapt this method for many issues. Decades of social science scholarship have documented and explored the interconnected nature of science, technology, and society. Multiple theoretical frameworks suggest the potential to direct this process of mutual shaping toward desired outcomes and away from undesired ones through broader inclusion of new voices and visions. In 2010, a group of researchers, educators, and policy practitioners established the Expert and Citizen Assessment of Science and Technology (ECAST) network to operationalize these frameworks. Over the course of a decade, ECAST developed an innovative and reflexive participatory technology assessment (pTA) method to support democratic science policy decision-making in different technical, social, and political contexts. The method's reflexive nature gave rise to continuous innovations and iterative improvements. The current ECAST pTA method includes three participatory phases: 1) Problem Framing; 2) ECAST Citizen Deliberation; and 3) Results and Integration. Proving adaptable and replicable, the method has generated outputs for decision-making on a variety of science and technology issues and at governance scales ranging from the local to the national and international. ECAST's distributed network model has also promoted independence, continuity, and sustainability through changing sociopolitical contexts. In this paper, we detail the current state of the ECAST pTA method; share mini case studies to illustrate circumstances that prompted new method innovations; and offer a vision for further developing and integrating pTA into democratic science policy decision-making.