The Amendment and Calibration of Test Difficulty Coefficient in Building Test Bank
Jiangshan Ma · Shuxue de shijian yu renshi · 2006
This article uses the relevance of statistical results of two kinds of measurement theories(CTT and IRT),and proposes that the method of defining the parameter of Difficulty coefficient in building test bank should be based on the invariance of item parameter estimates in IRT,by making full use of the advantage of CTT,combining the two by taking the merits of them,the purpose of defining the parameter of difficulty coefficient objectively and scientifically shall be realized.