2000 Volume 24 Issue 1 Pages 53-62
Answer-Until-Correct (AUC) item response model (HiROSE 1999) for the multiple-choice test items was examined in the case where the number of responses was restricted. By using 10,000 generated data of four-category items, the ability estimates from the completed AUC responses were compared with that from the uncompleted AUC responses in which the answering was terminated up to twice. The estimates from the uncompleted AUC responses correlated more than 0.9 with those from the complete AUC responses and the increase of the root mean square error (RMSE) was less than 6%. Furthermore, the estimates from the uncompleted AUC responses indicated much superior, in terms of RMSE, to other estimates based on nominal response model, 2-parameter logistic (2PL) model, and the number right score. This result demonstrated that the AUC item response model was useful even when the AUC procedure was uncompleted.
