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Piaget Developmental Stages

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According to developmental psychologist, Jean Piaget, the four stages of cognitive development start with the sensorimotor, which labels the behavior, sight, motion, and or brain process combined with the sensory and motor function of newborn infants to young children around the age of 24 months of age. The second stage is the preoperational stage which moves from 24 months through the age of around 7 years old. Third is the concrete operational stage, which begins around age 7 to about 12 years old. The final stage, formal operational, approaches during adolescence going into adulthood. With many experiments there have been minor adjustments made and one revision of Piaget’s sensorimotor stage is the A-not-B error, also known as "stage

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