If you refer to Crotty (1998) it offers an idea of constructionism. However, he tried to explain methodology from epistemological dimension. He set out 3 epistemological perspectives; objectivism, subjectivism and constructionism.

He explained constructionism as 'not believing in the existence of objective truth out there' for us to discover, but meaning coming from our interaction with reality.

From these epistemological angles comes paradigms/theories such as positivism, interpretivism, critical inquiry, feminism, post modernism, etc as elements of the second level of the research schema. The thrid level is the methodology incorporating grounded theory, ethnography, action research, etc. And the fourth and final level being the methods such as sampling, questionnaires, case study, etc.

Importantly, he noted that the whole methodological schema is very fluid and has continued to evolve over time.