幼児期における数直線の見積りの縦断的検討

A Longitudinal Study of Number Line Estimation in Young Children

浦上 萌

広島大学大学院教育学研究科紀要. 第三部, 教育人間科学関連領域

Bulletin of the Graduate School of Education, Hiroshima University. Part 3, Education and human science

The development of numerical representations plays a central role in a child’s mathematical abilities. Previous studies have reported that children’s numerical representations shift from logarithmic to linear ones and the slope of linear representation shifts from 0 to 1. In order to investigate the developmental process in detail, we carried out a longitudinal study. Thirty young preschoolers (mean age = 4 years, 1 month) and 47 middle preschoolers (mean age = 5 years, 1 month) received a number-to-position task (0-10) twice over nine months. According to our results, both groups were most suitable linear representations, but the slope of middle preschoolers’ performance was nearer 1 than the young preschoolers’ performance. However, the slopes of both groups were not much different when we divided the children in fitted or non-fitted function. For this reason, previous studies could not properly evaluate the development of slope. It is possible that the non-fitted representations are transformed into linear representations with slope away from 1 partly through logarithmic representations.

見積り

数直線課題

幼児

縦断研究

estimation

number-to-position task

young children

longitudinal study

教育 [ 370 ]

日本語

広島大学大学院教育学研究科

[ISSN] 1346-5562

[NCID] AA11625039