参考号：EM13132909

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Piaget's theory of cognitive development is a theory about the nature and development of human intelligence. Piaget theory was first developed by Swiss developmental psychologist Jean Piaget.

皮亚杰在出生Switzerland in 1896. After receiving his doctoral degree at age 22, Piaget began a career in psychology and education. After working with Alfred Binet, Piaget developed an interest in child intellectual development. He had observed children for a while, and his observations concluded that children were not less intelligent than their adult counter parts; they just think differently.

根据心理学家皮亚杰儿童development progress through a series of four key stages of cognitive development marked how they understand the world”. The four stages of Piaget's theory of cognitive development is Sensorimotor, Preoperational, Concrete operational, and Formal operational.

开发的第一阶段称为感觉运动阶段，该阶段发生在18-24个月的出生到18-24个月。这个阶段以试图理解世界的婴儿为中心。在感觉运动阶段，婴儿对周围的知识也有限，也是他或她的感觉观念和运动活动。他们的行为仅限于由感觉刺激引起的简单运动反应。凭借天生的天生技能，孩子们利用他们出生的技能和能力（例如看，吮吸，抓握和聆听），以了解有关环境的更多信息。

Stage two, is the Preoperational stage, which takes place between the ages two and seven. Through this stage, children language skills start to be developed. When children begin to learn language skills they mimic, manipulate information they learned from others.

第三阶段，混凝土操作是一个阶段，大约在七岁到11岁左右开始。在这段时间里，孩子们开始对心理操作有更好的了解，他们开始逻辑地思考。

Stage four, is the formal operational stage is the fourth and final stage of Piaget's theory of cognitive development. The formal operational stage begins at the age twelve and lasts into adulthood. During stage, people develop the ability to think about abstract concepts, and Skills, such as logical thought, deductive reasoning, and systematic planning.

总之，发展理论的伯爵阶段是一种蓝图，描述了从婴儿期到成年期正常智力发展的各个阶段。这些阶段包括思想，判断力和知识，每个阶段都获得了。