Photo voice is a related research method in which researchers give those being studied still or movie cameras. Research participants are taught to use the image making technology but are then responsible for making photos or movies which are subsequently analyzed either by the researchers or the participants, or both. The first use of photo voice was by Wang and Burris (published in 1994), where they defined it as "a method through which knowledge would be generated by people who were normally passive objects in the research process."