Jean Piaget
A Swiss developmental psychologist and founder of cognitive development theory. He systematically studied the stages of children's cognitive development and proposed core cognitive concepts such as object permanence.
Timeline (last 90 days)
The concept of object permanence was proposed by Jean Piaget and refers to the cognitive ability, acquired by infants at 8–12 months, to understand that objects continue to exist even when out of sight.
Jean Piaget, the founding theorist of constructivist learning theory, held that knowledge is actively constructed by learners through interaction with their environment rather than passively received
Elkind 将个人寓言概念置于皮亚杰（Jean Piaget）的认知发展理论框架之下，认为它是形式运算阶段青少年自我中心主义的表现
All Facts (3)
The concept of object permanence was proposed by Jean Piaget and refers to the cognitive ability, acquired by infants at 8–12 months, to understand that objects continue to exist even when out of sight.
50%UnverifiedJean Piaget, the founding theorist of constructivist learning theory, held that knowledge is actively constructed by learners through interaction with their environment rather than passively received
50%UnverifiedElkind 将个人寓言概念置于皮亚杰（Jean Piaget）的认知发展理论框架之下，认为它是形式运算阶段青少年自我中心主义的表现
50%