0-2
sensorimotor
2-7
pre operational
7-11
concerete
11-15
formal
sesniormotor
infant has basic reflexes and begins to construct an understanding of the world by coordinating sensory experiences with physical actions
pre operational
the child begins to represent the world with words and images - an increase in symbolic thinking from just sensory and physical actions
concrete operational
the child can now reason logically about concrete events
formal operational
the teen can reason more with logical and abstract thought