Genetic epistemology,equilibration and the rationality of scientific change

Genetic epistemology is concerned not only with the development of knowledge in the individual person, but also with the epistemological development of scientific thought. If so, problems and solutions in the one area should be roughly isomorphic to problems and solutions in the other area. To illustrate this, I consider Piaget's theory of equilibration and show how this theory has implications for issues concerning scientific progress, change and rationality. Piaget's views about these issues have much in common with claims of contemporary philosophers of science (such as Popper and Lakatos) concerning the rational growth of science, but in addition purport to be grounded in empirical psychology. This suggests thatt it may be fruitful to investigate the possibility of integrating cognitive psychology and philosophy of science in a new way.