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  • Sensorimotor (0-2)
    • Reflex Base
    • Coordinate Reflex
    • Object Permanency
  • Preoperational (2-6/7)
    • Self-Oriented
    • Egocentric
  • Concrete Operational (6/7-11/12)
    • More Than One Viewpoint
    • No Abstract Problems
    • Consider Some Outcomes
  • Formal Operational (11/12 & Up)
    • Think Abstractly
    • Reason Theoretically
    • Not All People Reach This Stage
jun 11 2012 ∞
nov 8 2014 +