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Early Adulthood
A life stage roughly spanning the ages of 20 to 40, characterized by physical maturity, increased independence, and the establishment of personal and professional relationships.
Cognitive Development
The study of how thinking, problem solving, and intelligence evolve as people grow from infants to adults.
Piaget
A psychologist best known for his theory of cognitive development that describes how children's intellect grows through stages.
Preoperational Stage
The second of Piaget’s stages, characterized by illogical use of words and symbols, spotty logic, and egocentrism.
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