... character. 24 12 2009 Hum. Dev. 30: 341-354 (1987) © 1987 S. Karger AG. Basel 0018-716X/8 7/0306-0341$2.75/0 A Constructivist Interpretation of Formal Operations Leslie Smith University of Lancaster. UK Key Words. Constructivism Formal operations Interpretation Piaget Propositional logic...

... in favour of a sound awareness of the procedure underlying a given phylogenetic construct. Moreover, precise questions related to conditionality would seem to advocate an extensive use of propositional logic which, last year, discreetly entered the phylogenetical arena. 23 12 2009 © 1984 S...

... the discussion of: (1) alternative logical structures to explain formal reasoning behavior and the relations between (2) logic and metaphysics, (3) logic and methodology, (4) logic and necessity, and (5) logic and the actual-possible distinction. 18 12 2009 Formal operations Propositional logic...