アダプティブテスティングにおけるIRT困難度の推定: LCTの結果を用いた支援推定法

URI http://harp.lib.hiroshima-u.ac.jp/it-hiroshima/metadata/12223
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Title
アダプティブテスティングにおけるIRT困難度の推定: LCTの結果を用いた支援推定法
Title Alternative
Estimation of IRT Difficulties in Adaptive Testing: An LCT Assisted Estimation Method
Author
氏名 廣瀬 英雄
ヨミ ヒロセ ヒデオ
別名 Hirose Hideo
Subject
collaborative work testing
learning check testing
item response theory
dually adaptive IRT
EM-type IRT
Abstract

It seems difficult to estimate the difficulties of the problem items in the adaptive testing even if we use the EM-type IRT (item response theory) method because the response matrix made by the adaptive testing becomes sparse which is not enough to estimate the item difficulties and examinees’ abilities. In this paper, we propose to use the known ability values from other testing results if the examinees are the same. In the follow-up program systems, we have been using three kinds of testing, the LCT (learning check testing), the CWT (collaborative work testing), and the FPT (follow-up program testing), in which the LCT provide accurate estimates for ability values. We use the LCT’s ability values in the CWT estimation. For stable estimation, we have used one-parameter estimation method (Rasch model) instead of two-parameter estimation method which is used in common. The estimation is performed well. In addition, comparing the method of 2017 CWT difficulty estimation with that of the 2016, we have found that in estimating the difficulty parameters using artificial response matrix where 0 values are imposed in the vacant elements the estimates of difficulty parameters are heavily biased to difficult problem side.

Journal Title
広島工業大学紀要. 研究編
Volume
52
Spage
103
Epage
108
Published Date
2018-02
Publisher
広島工業大学
ISSN
1346-9975
NCID
AA11599110
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
出版社版
Rights
publisher
Set
it-hiroshima