幼児の走動作の主観的評価への項目応答理論の適用

抄録

　The purpose of this study is to construct a subjective assessment test of running form in children using Item Response Theory. 129 kindergartners were timed in the 25-meter run and 17 different parts of the body were checked for movement on a three-point scale of "yes", "unknown" and "no". The results of the main factors confirmed a one-dimensional structure, therefore the Item Response Theory was applied and to determine the difficulty parameter and capacity value. From the tests mentioned above, the following results were obtained.

1) Results yielded separately from samples randomly split into two groups showed a high rate of correlation. θ results of item groups yielded from the two randomly split groups showed a high rate of correlation and the capacity value was that of items that were nonexistent.

2) A significant difference was found in the θ the average of different age groups and it can be thought that is a measure of ability in proportion to age.

3) Judging from the information scheme, the assessment method for all 17 items peaked at the lower ability level, and was better suited to determine individual differences at the lower ability level.

　Furthermore, a simple method for measuring the capacity value of lower and middle levels were proposed, which needed no complex mathematical formula but showed lower accuracy. However, a high ability level test could not be constructed because the difficulty level for the items were too low. The test based on the results of this study requires no special equipment, but rather, uses a group as its specimen, therefore in terms of practicality, it can be said that this test is useful.