Piaget’s stages of development include sensorimotor, preoperational, concrete operational, and formal operational. While there is some criticism of them, they may help characterize child development.

Vol. 89, No. 6, SPECIAL SECTION: Meta-analysis and Individual Participant Data Synthesis in Child Development (NOVEMBER/DECEMBER 2018), pp. 2288-2302 (15 pages) In 1997, I argued that with the loss of ...

Human Development, Vol. 36, No. 2 (1993), pp. 61-81 (21 pages) In this article we examine the theories of Vygotsky, Piaget, and Bandura as they deal with the relation between the social world and ...

Jean Piaget (1896-1980) always considered himself a natural scientist, not a psychologist. As a boy he quickly gave up play and pretend to take refuge in "work" -- exploring internal combustion ...