Purpose: Often radical constructivists are confronted with arguments why radical constructivism is wrong. The present work presents a radical constructivist alternative to such arguments: a comparison of the results of two instructional practices, the standard, realist-based instruction and a radical constructivist-based instruction, both in physics courses. Design: Evidence from many studies of student conceptions in standard instruction (Duit 2004) is taken into account. In addition, diagnostic data, pre and post instruction, were collected from over 1,000 students in multiple institutions across (...) the U. S. over a period of about 15 years via an established diagnostic of conceptual understanding of motion and force. Findings: Evidence from many studies of student conceptions in standard instruction (Duit, 2004) is that little or no change in student conceptions happens in standard instruction. About half the students in the particular study reported, all science and engineering majors, experienced standard, realist-based instruction and show an average effect size of 0.6 standard deviations and an average normalized gain of 15%. The other half of the students, none of whom were science and engineering majors, experienced radical constructivist-based instruction and show an average effect size over 2.5 standard deviations and an average normalized gain over 60%. Diagnostic pre scores were nearly the same for both groups. Practical implications: The outcome, that students, neither science nor engineering majors, made changes in understanding foundational topics in physics far greater than science and engineering students, poses (1) an ethical challenge to the continued adherence to standard, realist-based instructional practices and (2) an intellectual challenge to the usefulness and appropriateness of the elitist-realist paradigm on which such standard instruction is based. Conclusion: This radical constructivist argument uses the effect of paradigms to judge their pragmatic value, not their truth-value. Based on pragmatic value, radical constructivism results in superior outcomes when applied to physics instruction. The approach to instruction can be applied generally in education. (shrink)

Open peer commentary on the article “Constructing Constructivism” by Hugh Gash. Upshot: Gash describes some very interesting and exemplary work using RC-influenced research and practices. I worry that his third stage of a three-stage emergence of constructivist epistemology in the study of cognitive development is consistent with a distinction between focus on individual cognitive development and focus on knowledge not in the mind but in the group, inconsistent with RC. An alternative is given and the issue of an RC perspective (...) on social justice is discussed. (shrink)

Context: In spite of its advantages and its ability to make valid responses to objections, radical constructivism is not mainstream. Problem: Extolling the virtues of radical constructivism and responding logically to the objections does not work. We know this from the evidence of many attempts. Our theoretical stance, radical constructivism, also suggests this approach is not likely to have much influence on realists. We cannot transmit understanding in the signals with which we attempt to communicate. How can we in radical (...) constructivism enable those outside of RC to understand our explanation of human knowing? Method: Examine our understanding of radical constructivism itself, because it is an explanation of how, why and under what circumstances people change their understandings of their experiential worlds. Results: We must find ways to direct the attention of others to situations that they cannot explain with their existing understanding of the world. Then we must create conditions conducive to their revising and testing new understandings for fit with the evidence of their experience. Implications: Since radical constructivism is a theory of human knowing, it tells us how humans develop knowledge, hence it is an answer to the questions central to this special issue. This answer is not one to be used to win in debates with realists. Radical constructivism gives us an answer to the problem of engaging realists in understanding our position, but strategies consistent with radical constructivism are not easily carried out. Developing and executing such strategies is the work at hand. (shrink)

Problem: What alternative strategies from our experiences using a Piaget-based radical constructivist pedagogy might have more and better results than the current practice of responding in debate form, each side trying to prove the other wrong? Method: Use of Slezak’s paper to illuminate the point that the central problem with the interpretation of RC generally used in such writing is that the authors seem not to be able to operate from the central tenet of RC, which is the opposite of (...) that used in realism. Description of how this failure to use the central tenet of RC results in claims that RC is irrelevant to education and to definitions of good teaching. Results: A specific approach shown to be useful in facilitating the construction of new understanding in science is adapted in order to guide interaction between an RC and a realist, which can result in the realist understanding the RC point of view. Implications: Instead of debating with critics of RC, where each side is trying to prove the other side wrong, we need to change the interaction to one in which members of opposing sides attempt to understand the other’s position. In this situation we are in a position to use a pedagogical strategy in which the realist examines her own fundamental assumption that we can know a mind-independent world, and considers the implications of a starting assumption that is exactly the opposite. (shrink)