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Piaget's Stage 2 of Cognitive Development
Piaget's Stage 4 of Cognitive Development
Piaget's Stage 1 of Cognitive Development
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Updated: Jul 31, 2025

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools
Published on: June 20, 2020
1University of California, Berkeley, USA.
Three-year-old children demonstrate an understanding of possibility, challenging prior beliefs about preschoolers lacking modal concepts. This study suggests young children can grasp concepts like "possible" and "necessary" earlier than previously thought.
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