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4.10.1 The evolution of cognition.

Developmental theory has been enriched by several stage theories of human cognitive development. If these theories are validated in all societies investigated it would lend support to the presence of universal cognitive structures, and by inference point to the biological basis for development. Piaget (1963) was the most influential researcher in the field of cognitive development. In-depth studies of children, some his own grandchildren, led him to formulate a theory of cognitive development in four stages. Stage one is called sensorimotor where the infant learn from direct sensory engagement with the environment. This stage last from infancy to about two years. The child understands his world through sensory perceptions and motor behaviors that occur in the process of interacting with the demands of the environment. Other cognitive achievements include learning to imitate others and learning by observation. Also the child begins language acquisition at this stage an achievement significant for later communication.

Stage two from about 2 to 7 years of age is called the preoperational stage where egocentrism is supreme as children don’t understand the perspectives of others. However, this stage is also fundamental to language acquisition as the child expands vocabulary and understanding. Children’s thinking is dominated by conservation defined as the ability to understand that changes in appearance do not change an objects volume or weight. Centration is another characteristic of cognition in stage 2 that allows the child to focus on solitary objects or problems. The child also masters irreversibility which is the ability to reverse the process of problem solving. Egocentrism that is manifested as this stage show that children cannot yet see problems from the perspectives of others. Finally, animism is the child’s fantasy that all objects have life. A doll is living and may take on aspects of personality as children at this stage do not operate by logic.

Stage three is the concrete operations stage and last from about 7 to 11 years of age. At this stage cognition actually increases in complexity as children are able to view problems from a variety of perspectives. Taking the perspectives of others is considered a significant cognitive achievement. Children at this stage begin the development of more abstract thinking since they can assess more than one aspect of a problem or issue.

Finally, children learn to think abstractly in the fourth stage called formal operations. That stage last from about 11 years of age until the end of life. The individual operating at this stage can think logically about abstractions like notions of democracy and justice. As life progresses thinking become more systematic in problem solution. Formal operations is a cognitive process that allows for stage movement called assimilation where the individual fits new concepts into what is already understood, and accommodation where the individual changes his understanding by integrating concepts that don’t fit the preexisting conceptual structure.

Piaget in fact believed that these stages of cognitive development were universal and each followed the preceding sequentially. Dasen (1984, 1994) found evidence for the universality of the stage sequence across cultures. However, methodological problems make valid comparisons difficult (Gardiner, Mutter, & Koskitzki, 1998). Although Piaget valued the final stage of formal operations there is little evidence that it is a form of universal cognition as people can indeed have reproductive success in Western cultures and other societies without abstract thinking.

However, some support is present in the literature. The invariance of the stages was found in a study on school age children in several countries that showed that these children learned problem solving in the order predicted by Piaget (Shayer, Demetriou, & Perez, 1988). However, the ages that children achieved these stages varied by culture (Dasen, 1984). Some research indicated that Piaget’s cognitive stages are not invariant as the children do not achieve the skills in the same order (Dasen, 1975). Finally, abstract thinking found in formal operations may be a cognitive development especially favored in societies that have benefitted from scientific development. Islamic cultures focus more on the rigid cultural transmission of faith that is less adaptable to abstract thinking required in a world of transition. Cole argued that formal operations required a Western education demonstrating the dependence of the Piagetian model of cognition on cultural values (Cole, 2006).

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