Piaget Stages

Front 1

sensorimotor

Back 1

birth - 2 yrs

infants "think" by interacting with the world through their senses.
Beginning problem solving and investigation. (e.g., pulling levers to see a toy, searching for objects)

Front 2

preoperational

Back 2

2-7 yrs

Preschool children use symbols to represent their earlier sensorimotor discoveries. Development of language and make-believe play takes place. However, thinking lacks the logic of the last two stages.
-Object permanence achieved.

Front 3

concrete operational

Back 3

7-11 yrs

Reasoning becomes logical and better organized.
- organize objects into classes and sub-classes
- Understanding that a certain amount of material remains the same quantity even as shape changes.

Front 4

formal operational

Back 4

11 years on

-capacity for abstract, systematic thinking
- use of hypothesis, testable inferences, isolating and combining variables to confirm or reject inferences.
- can evaluate the logic of verbal statements without referring to real-world circumstances.