An introduction to radical constructivism.
In: Watzlawick P. (ed.) The invented reality. Norton, New York: 17–40.
Fulltext at http://cepa.info/1279
List owner’s comment: This is the "classical" introduction to Radical Constructivism in which Ernst von Glasersfeld describes the motivation and philosophical concepts that lead to the formulation of his constructivism. The text is a well-written introduction that can be easily understood by readers without philosophical background.