Notes

tags: Educational Measurement

tags: Educational

tags: IRT,读书笔记 source: Yu, Chong Ho. “A Simple Guide to the Item Response Theory ( IRT ) and Rasch Modeling.” Accessed January 6, 2022. https://www.semanticscholar.org/paper/A-Simple-Guide-to-the-Item-Response-Theory-(-IRT-)-Yu/f42efb1bcf38f6650a8b16650e2811e8803cd4ec. IRT is about fitness or simplicity for test. There are two versions of IRT: IRT - three parameters. Rasch modeling - one parameter only. Three parameters: A - discrimination, how effectively this item can discriminate students’s proficient between highly and less. B - difficulty, or the threshold, tells us how easy or how difficult an item is. G or C - guessing, indicates the item correct by guess. One parameter: keep the A parameter constant and ignoring the G parameter. ...

tags: Algorithm,Bigdata,Educational Measurement