You will note in the Crotty readings that his emphasis is on constructionism, what he at times calls social constructionism (or sometimes social constructivism). While it may seem at first reading this is all about different words for the same or different things, these are indeed critical differences that matter. Constructivism, especially social constructivism, is the epistemological foundation for interpretative and critical research perspectives. Davis & Sumara’s article, that refers more to teaching than research, is nonetheless excellent on these distinctions. Knowing whether you adopt a subject-centred constructivist epistemology or a subject object interdependent constructionist epistemology is an important step in finding a research orientation that is sensible.