“一个苹果切三刀分成八块,怎样切法?”这是全国心理学会组织国内十个地区协作研究7—12岁儿童数概念和运算能力发展的测查题目之一。 最近我们利用这套方案对固原地区150名儿童进行了测查。测查中,各年龄组的儿童都对这道切苹果题目发生了浓厚的兴趣,个个跃跃欲试。但其中只有13％的儿 “How to cut an apple into three parts?” This is one of the topics that the National Institute of Psychology organizes the survey on the development of concepts and computing power of 10-12 years old children in 10 districts in China. Recently, we used this program to test 150 children in the Guyuan area. During the test, children of all ages had a strong interest in this topic of cutting apples, all of whom were eager to do so. But only 13% of them