[Public participation in research projects: ways of creating collective knowledge in health].

Public participation in research projects is an emerging area in Spain and Latin American countries. There are five types of projects according to the degree of involvement that the participants have in the processes: contributory, collaborative, co-created, contractual and independent. In order to promote public participation in health research teams, their practices and competencies need to be redefined. To this end, it may be useful to ask questions in the different phases of the research, as well as to develop strategies that include audiences that have fewer channels of participation in favour of favouring equity in health. This way of doing science allows gathering experience and expertise prioritizing and adapting the research to the needs of the population, which increases its transforming capacity and the social impact of its results.