A Parameter Estimation of Polychotomously-Scored Response Model Based on IRT
Wang Yong-guo · College Mathematics · 2010
Based on item response theory,the article first looks the probability in the double parameter logistic model as examinees’score-rate,and adopts least square method to estimated the items and ability parameters in the polychotomously-scored model,then iterates the result according to known conditions,presents a very practical parameters estimated method.