This article introduces the concept of "co-impact" to characterise the complex and dynamic process of social and economic change generated by participatory action research (PAR). It argues that dominant models of research impact tend to see it as a linear process, based on a donor-recipient model, occurring at the end of a project…

In this case study, two high school teachers, a university researcher, and 10 high school students (ages 16-19 years) were part of an action research group that addressed an issue--smoking on school grounds--identified by a high school population as being problematic. The research was guided by the following research questions: "Within a…