An Introduction to EasyEstimation

Abstract

　This paper explains “EasyEstimation,” a computer program developed by the author for analyzing item response theory. The author describes the background to developing EasyEstimation, its design policy, and the IRT analyses that EasyEstimation can perform (e.g., estimation item and examinee parameters). Finally, the author explains a large-scale investigation conducted by the MEXT as an example of using EasyEstimation.