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Abstract: This experiment was conducted on young children (aged from 3 to 7)and based on the previous study, "Study on children's prediction andidentification of spatial positional relationship between the ages of 8 and13". 200 Ss were divided into 5 age groups (40 Ss in each group), theywere tested in the present study. The procedure included two steps: theprocedure of the previous study was repeated on the first step; an ob-ject with an obvious mark on each of the four sides was used as stimulus. The findings of the experiment further illustrated (a) children's per-ceptural experiences and obvious marks of objects are important factorsin the children's development of spatial cognition; (b) the egocentrism ismost significant in 8-year-old children; (c) the developmental stages insolving the three-mountain problem in Chinese children are the same asdiscribed by Piaget; (d) there are two kinds of relations between chil-dren's performance and errors in this task: the changes of performance areconsistent with the tendency of allocentralization after 8 and withother errors before 7. The data of the study tells us something aboutdevelopmental stages and features in the three-mountain problem of Chin-ese children.

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