摘要
利用最小二乘估计方法和广义逆，在同一量尺上，同时给出题目难度参数、区分度参数。
By the methods of least square estimation,the tool of Moore Penrose qeneral invertible matrix and the same scale of measurement, the estimations of person(ability) parameters and item parameters(item difficulty parameter and item discrimination parameter) are provided in this article.
关键词
题目参数
能力参数
最小二乘估计
参数估计
item parametes
ability paramete
least square estimation
general inverbible matrix
