Piaget's Cognitive Stages

PIAGET'S COGNITIVE DEVELOPMENT

Jean Piaget proposed that children's cognitive development occurs in four distinct stages: **Sensorimotor** (birth to 2), **Preoperational** (2 to 7), **Concrete Operational** (7 to 11), and **Formal Operational** (12 and up). This model emphasizes that children think differently than adults—they are not just 'mini-adults.' In AP Psychology, it is essential to master the key features and limitations of each stage, including object permanence, egocentrism, and conservation.

SCHEMAS, ASSIMILATION, AND ACCOMMODATION

Piaget believed that as we interact with the world, we develop **schemas**—mental frameworks that help us organize information. When we encounter new data, we either **assimilate** it (fit it into existing schemas) or **accommodate** our schemas (change them to fit the new data). This process of building and refining mental models is the core of cognitive growth across the lifespan.

HOW TO USE THIS VISUALIZATION

1. **Select a Stage**: Click on one of the four age blocks in the 'Growth Timeline'. 2. **Run a Test**: Click 'Test Conservation' in the Concrete Operational stage. Watch the child evaluate two glasses of water to see if they understand that volume remains the same even when shape changes. 3. **Explore Egocentrism**: In the Preoperational stage, click 'Mountain View' to see if the child can describe what someone on the opposite side of the table sees. 4. **Check Object Permanence**: In the Sensorimotor stage, click 'Hide the Bear' to see if the infant searches for the hidden toy.

AP EXAM CONNECTION

KEY TAKEAWAYS

• Development progresses through four qualitative stages.
• Conservation is mastered during the Concrete Operational stage.
• Egocentrism is a hallmark of the Preoperational stage.
• Schemas are refined through assimilation and accommodation.