- Sensorimotor (0-2)
- Reflex Base
- Coordinate Reflex
- Object Permanency
- Preoperational (2-6/7)
- 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 +