Since the second half of the 20th century, research practices in social science and the humanities in Latin America and the Caribbean have been developed alongside criticisms of positivist methodologies. Some of the main interventions are reviewed by scholars such as Orlando Fals Borda, João Bosco Guedes Pinto, Michel Thiollent, Paulo Freire, Carlos Rodrigues Brandão, and Oscar Jara. Participation is central to all of these, but each contain nuances that must be identified, explained, and analyzed. Furthermore, these interventions relate to the field of popular education or, more broadly, to practices associated with critical educational proposals.