Jean Piaget, Children and the Class-Inclusion Problem av Dolph Kohnstamm

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<P>The Classic Edition of Dolph Kohnstamm¿s <I>Jean Piaget, Children and the Class-Inclusion Problem</I><I>, </I>first published in 1967, includes a new introduction by the author, describing for readers the original context for his work, how the field has moved forward and the ongoing relevance of this volume. </P><P></P><P>This enduring text offers a critical study of a cornerstone of Piaget¿s theory that a child''s ability to solve problems of class-inclusion marks the beginning of the period of concrete (logical) operations at about 7 or 8 years of age. Kohnstamm''s experiments show, however, that, with a teaching method that provokes children¿s authentic logical thinking processes, most children of 5 can already learn to solve a variety of class-inclusion problems, up to a level where they can even invent similar but new problems themselves. These results question the basic assumption of Piaget''s theory that logical operations can only develop in firmly connec