Quick Reference: Piaget’s Stages of Cognitive Development

Sensorimotor

Experience world through senses and actions.
Birth to 2 years old.

Preoperational

Lack logic, but representing things with words and images.
Egocentrism.
Ages 2 to 6 years.

Concrete Operational / Operations

Thinking logically, grasping concrete analogies, arithmetical operations, no abstract logic.
Ages 7 to 11.

Formal Operational / Operations

Abstract reasoning.
Ages 12 through adulthood.