The Epistemic Relativism of Radical Constructivism: Some Implications for Teaching the Natural Sciences

Purpose: The relativism inherent in radical constructivism is discussed. The epistemic positions of realism and relativism are contrasted, particularly their different approaches to the concept of truth, denoted ( respectively) as "truth by correspondence" and "truth by context." I argue that the latter is the relevant one in the domain of science. Findings: Radical constructivism asserts that all knowledge must be constructed by the individual knower. This has implications for teaching, here imagined as a sharing of knowledge between teacher and students: it should be done, not by "reporting the true facts" of whatever is being taught, but rather by "telling a story" about it. An explicit distinction is made between the notions of cognitive and non-cognitive knowledge. It is argued that cognitive knowledge ( such as in mathematics and science) is characterised by rules that can be unambiguously agreed on by actors who choose to "play the game"; and hence such knowledge is directly communicable from the teacher to the students. Implications: In telling the story of science, the teacher can verify that the students "have got it right," even though they are all constructing their knowledge individually. In contrast, for non-cognitive knowledge (emotion, preferences, belief,.) there are no such unambiguous rules to agree on, and therefore it is not communicable in this way: in telling this story, the teacher has no way of verifying that the same knowledge is actually being shared. Conclusion: Science teaching should be carried out in the mode of story-telling; it does not need an epistemology of realism. Conclusion: Science teaching should be carried out in the mode of story-telling; it does not need an epistemology of realism.