Piaget’s theory of Cognitive Development Jean Piaget (1896-1980) was one of the 20th centuries most influential researchers in the area of developmental psychology. He was mainly interested in the biological influences on ―how we come to know. Piaget believed that what distinguishes human beings from other animals is our ability to do ―abstract symbolic reasoning. There are two major aspects to his theory: the process of coming to know and the stages we move through as we gradually acquire this ability. Piaget (1936) was the first psychologist to make a systematic study of cognitive development. His contributions include a theory of child cognitive development, detailed observational studies of cognition in children, and a series of simple but ingenious tests to reveal different cognitive abilities. Before Piaget’s work, the common assumption in psychology was that children are merely less competent thinkers than adul...
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