Jean Piaget's Cognitive Stage theory
Emphasis on mental processes Clinical method - combined observation with flexible questioning Comprehensive theory of cognitive development Organization - tendency to create increasingly complex cognitive structures or schemes (Systems of knowledge or ways of thinking that incorporate more and more accurate images of reality) Adaptation - how children handle new information in light of what they already know; involving assimilation (taking in new information and incorporating it into existing cognitive structures) and accommodation (changing one's cognitive structures to include the new information); the shift from one to the other is dictated by equilibriation (constant striving for for a stable balance or equilibrium)