1. Anderson, J. R. (1990). The adaptive character of thought.Hillsdale, NJ: Lawrence Erlbaum Associates, Inc.
2. Student conceptions of natural selection and its role in evolution
3. Brown, A. L. & Campione, J. C. (1990). Communities of learning and thinking, or A context by any other name. Contributions to Human Development, 21, 108-126.
4. Gentner, D. & Gentner, D. R. (1983). Flowing waters or teeming crowds: Mental models of electricity.In D. Gentner & A. L. Stevens (Eds.), Mental models (pp. 101-129). Hillsdale, NJ: Lawrence Erlbaum Associates, Inc.
5. H&, R. (1984). Personal being: A theory for individual psychology.Cambridge, MA: Harvard University &'LESS.