Definition: Participatory Action Research (PAR) The national Institute of Disability and Rehabilitation Research has proposed the following working definition of PAR: Participatory Action Research (PAR) recognizes the need for persons being studied to participate in the design and conduct of all phases (e.g., design, execution, and dissemination) of the research that affects them. PAR is an approach or strategy for research not a methodology. NIDRR, 1995