In recent years the Artificial Intelligence research group at the University of New Mexico have considered several areas of problem solving in interesting and complex domains. These areas have ranged from the low level explorations of a robot tasked to explore, map, and use a new environment to the development of very sophisticated control algorithms for the optimal use of particle beam accelerators. Although the results of our research have been reflected in computer-based problem solvers, such as the robot discovering and mapping out its world, these computational tasks are in many ways similar to expert human performance in similar tasks. In fact, in many important ways our computer-based approach mimics human expert performance in such domains. This paper describes three of these task domains as well as the software algorithms that have achieved competent performances therein. We conclude this paper with some comments on how software models of a domain can elucidate aspects of intellectual performance within that context. Furthermore, we demonstrate how exploratory problem solving along with model refinement algorithms can support a constructivist epistemology.

Key words: artificial intelligence, constructivist epistemology, human complex problem solving, model refinement, diagnostic reasoning, intelligent control.

The radical constructivist assertion that the student constructs his or her own knowledge as opposed to receiving it “ready made” echoes the classical debate as to whether the human subject constitutes the world or is constituted by it. This paper shows how the philosophical traditions of post-structuralism and hermeneutic phenomenology offer approaches to effacing this dichotomy and how this forces a re-assertion of the teacher’s role in the student’s constructing of mathematical knowledge. It is also shown how hermeneutic phenomenology provides an opportunity to ground constructivist mathematical thinking in the material qualities of the world.

This paper addresses the parallel between the changes in students’ and teachers’ learning advocated by constructivist science educators. It begins with a summary of the epistemology of constructivism and uses a vignette drawn from a set of case studies to explore the impact of a constructivist science in‐service programme on an experienced and formal elementary science teacher. Judged by constructivist standards, the teacher described in the vignette makes very little progress. The irony of applying a constructivist critique to his work, however, is that it fails to treat the teachers’ imperfect knowledge of teaching with the same respect as constructivists treat students’ imperfect learning of science. The remainder of the paper explores this constructivist paradox, and suggests that‐like students’ knowledge of science‐teachers’ knowledge of constructivist science teaching is likely to grow through slow and gradual re‐formation of their established understanding of classroom theory and practice.

This article addresses a classical question: Can a machine use language meaningfully and if so, how can this be achieved? The first part of the paper is mainly philosophical. Since meaning implies intentionality on the part of the language user, artificial systems which obviously lack intentionality will be `meaningless’ (pace e.g. Dennett). There is, however, no good reason to assume that intentionality is an exclusively biological property (pace e.g. Searle) and thus a robot with bodily structures, interaction patterns and development similar to those of human beings would constitute a system possibly capable of meaning – a conjecture supported through a Wittgenstein-inspired thought experiment. The second part of the paper focuses on the empirical and constructive questions. Departing from the principle of epigenesis stating that during every state of development new structure arises on the basis of existing structure plus various sorts of interaction, a model of human cognitive and linguistic development is proposed according to which physical, social and linguistic interactions between the individual and the environment have their respective peaks in three consecutive stages of development: episodic, mimetic and symbolic. The transitions between these stages are qualitative, and bear a similarity to the stages in phylogenesis proposed by Donald (1991) and Deacon (1997). Following the principle of epigenetic development, robotogenesis could possibly recapitulate ontogenesis, leading to the emergence of intentionality, consciousness and meaning.

The article on radical constructivism criticizes its claim of being an original paradigm as well as criticizing some contradictions and scarcely justified theoretical leaps, and some specific problems over previous ideas in teaching and theoretical frames in scientific research. The critique underlines the controversial subject of empirical and experimental methods in learning and research and proposes a comparison between empiricism and radical constructivism axioms (with a suggested isomorphism between supposed opposing theories) as well as a tendency for both paradigms to slip towards epistemological realism. Also discussed are some aspects regarding research management and education

This commentary is a critical appraisal of Gil-Pérez et al. ‘s (2002) conceptualization of constructivism. It is argued that the following aspects of their presentation are problematic: (a) Although the role of controversy is recognized, the authors implicitly subscribe to a Kuhnian perspective of “normal’ science; (b) Authors fail to recognize the importance of von Glasersfeld’s contribution to the understanding of constructivism in science education; (c) The fact that it is not possible to implement a constructivist pedagogy without a constructivist epistemology has been ignored; and (d) Failure to recognize that the metaphor of the “student as a developing scientist’ facilitates teaching strategies as students are confronted with alternative/rival/conflicting ideas. Finally, we have shown that constructivism in science education is going through a process of continual critical appraisals.

A review of the chemical education research literature suggests that the term constructivism is used in two ways: experience-based constructivism and discipline-based constructivism. These two perspectives are examined as an epistemology in relation to the teaching and learning of the concept of idealization in chemistry. It is claimed that experience-based constructivism is powerless to inform the origin of such concepts in chemistry and while discipline-based constructivism can admit such theoretical concepts as idealization it does not offer any unique perspectives that cannot be obtained from other models. Chemical education researchers do not consistently appeal to constructivism as an epistemology or as a teaching/ learning perspective and it is shown that, while it draws attention to worthwhile teaching/learning strategies, it cannot be considered as foundational to chemical education research and tends to be used more as an educational label than as an undergirding theory.

Key words: experience-based constructivism, discipline-based constructivism, idealization

Purpose: To consider how the approach and work of Heinz von Foerster, among others, can aid psychotherapists. Design/methodology/approach – A family therapist, as every therapist, is caught in the dilemma that (s)he cannot separate what (s)he sees from who (s)he is. One possibility to understand what happens in a therapeutic system is by means of the model of resonance. The therapist observes himself or herself and regards these thoughts and emotions as part of the therapeutic system. (S)he takes part in the reciprocal double binds, i.e. the strategy how each member of a human system s(he) is part of is protecting the worldview of the others by acting in a way, which is reinforcing their worldviews. Thus, a homeostasis is maintained. Findings: Proposes a new systemic approach closer to Ilya Prigogine’s work on systems far from equilibrium where chance plays a role helping members of human systems to leave a world of predictability and to enter a universe of freedom and responsibility. Also uses the teachings of Heinz von Foerster about being part of the world and not separated observers. The viewpoint of constructed realities entails freedom and responsibility and is a highly ethical position. Originality/value – Provides help in understanding how the teachings of Heinz von Foerster, among others, can aid psychotherapists.

Key words: cybernetics, therapists, ethics.

A bibliographical revision of those papers which deal specifically with the controversies and problems of constructivism in Science Education, has permitted us, to make an overview of the origins, bases and pedagogical proposals of the different ways of understanding constructivism. We then distinguished different levels about of knowledge that sustains or underlies the Science Education. These levels have allowed us to situate the principal constructivist movements, enabling us to then clarify and reflect on the future of Science Education.

This article reports on two types of resistance by preservice science teachers: resistance to ideological change and resistance to pedagogical change. The former has to do with the feelings of disbelief, defensiveness, guilt, and shame that Anglo-European preservice teachers experience when they are asked to confront racism and other oppressive social norms in class discussions. Resistance to pedagogical change has to do with the roles that preservice teachers feel they need to play to manage conflicting messages about what they are expected to do from their cooperating teachers (cover the curriculum and maintain class control) and from their university supervisors (implement student-centered, constructivist class activities), and about what they desire to do as emerging teachers. Although these two forms of resistance are closely linked, in the literature they are extensively reported separately. This study suggests a sociotransformative constructivist orientation as a vehicle to link multicultural education and social constructivist theoretical frameworks. By using this orientation, specific pedagogical strategies for counterresistance were found effective in helping preservice teachers learn to teach for diversity and understanding. These strategies for counterresistance were primarily drawn from the qualitative analysis of a yearlong project with secondary science preservice teachers.