| http://www.w3.org/ns/prov#value | - ??? Preoperational stage Piaget's second stage of cognitive development (lasting from about age 2 to age 6 or 7), during which the child begins to represent the world symbolically ??? ??? ??? Egocentrism Inability to perceive a situation or event except in relation to oneself; also know as self-centeredness ??? ??? ??? Decentration Process of changing from a totally self-oriented point of view to
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