The acquisition of propositional logic and formal operational schemata during the secondary school years

Journal of Research in Science TeachingVolume 15, Issue 6 p. 465-478 Article The acquisition of propositional logic and formal operational schemata during the secondary school years Anton E. Lawson, Anton E. Lawson Science Education, Department of Physics, Arizona State University, Tempe, Arizona 85281Search for more papers by this authorRobert Karplus, Robert Karplus Lawrence Hall of Science, University of California, Berkeley, California...