前运算阶段

同时也表现在儿童心理发展的两个不同阶段，即感知-运动阶段和前运算阶段。

It is also embodied in two stages of children 's psychology development : sensorimotor stage and pre-operation stage .

皮亚杰根据人的智力发展特点，提出了教育过程应分为感知运动阶段、前运算阶段、具体运算阶段与形式运算阶段。

According to the feature of individual intellectual development , Jean Piaget argues that the process of education should fall into 4 periods : activity cognition , pre-operation , practical operation , and formal operation .

皮亚杰认知发展理论包括认知发展的阶段说和影响认知发展的因素分析两部分内容，前者把人的认知发展过程分为感知运算阶段、前运算阶段、具体运算阶段和形式运算阶段连续的四个时期；

Piaget 's cognitive development theory contains both the periods and the factors . The former classifies the processes into four stages : the perceptive stage , pre operation stage , concrete operation stage and formal operation stage .

根据皮亚杰的智力发展理论，结合前运算阶段幼儿智力的特征，分析总结出了幼儿智力开发的循序渐进、因材施教与适度教育的原则。

According to Piaget theory of mental development and combined with preschoolers characteristics of the preceding operation stage , we analyze and summarize the following mental development principles : knowledge advances by steps not by leaps ; teach students in accordance with their aptitude and appropriate education .