Piaget's Stages

• The sensorimotor stage lasts between zero to two years and is characterized by the child's ability to respond to their environment and to learn to use their body
• The preoperational stage lasts between two to seven years and is characterized by the development of symbolic thinking (playing pretend/imagination), egocentrism (inability to understand how a person feels), and centration (only focusing on one part of a phenomenon)
• The concrete operational stage lasts from ages seven to eleven and is characterized by an understanding of conservation and logical thinking about concrete ideas
• The formal operational stage lasts from age eleven to end of life and is characterized by logical thinking about abstract concepts