The Strengths And Weaknesses Of Piaget 's Cognitive Development Theory

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Jean Piaget is a key figure for development, focusing on cognitive constructivism – that being that we must learn from experience and development, building on knowledge that has already been developed. The strengths and weaknesses of Piaget 's cognitive development theory will be discussed. Piaget suggests that development in children occurs in four stages: sensorimotor, preoperational, concrete operational and formal operational. During the Sensorimotor stage (between birth and the age of two), Piaget claims that sensory and motor skills are developed, as well as claiming that infants are unable to grasp object permeance until eighteen to twenty-four months; Piaget argued that if a child could not see the item, it no longer existed to them. When the child’s age was between nine and ten months, more experiments were done into object permeance, resulting in the 'a not b ' test, in which one object was hidden underneath an item, and then switched. Despite the obvious difference in sizes underneath the two objects, the child would still believe the item to be under where it was originally found. Furthermore, Aguiara and Baillargeon (2002), suggested the violation of expectation; using the example of a doll moving between two opaque objects and reappearing in the centre – the child will then be surprised, as to them the object had no longer existed. During the ages of two to seven, the child would be in the preoperational stage. This involves the child having an egocentric

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