1. Ecological systems theory;Bronfenbrenner,1992
2. Levels of organization, downward causation and the selection theory approach to evolutionary epistemology;Campbell,1990
3. Categorization and representation of physics problems by experts and novices;Chi;Cognitive Science,1989
4. Power analysis for the behavioral science;Cohen,1988
5. Speculations on the foundations of knowledge and intelligence;diSessa,1994