اثر طريقة تقدير الدرجات ونموذج الاستجابة للمفردة في دقة تقدير بارامترات الافراد والمفردات لاختبار صواب وخطا متعدد

The Effect of Estimating Scores Method and Type of Item Response Model on Accuracy of Estimating Persons and Items Parameters for Multiple True and False Test

The current research aimed to investigate the effect of estimating scores methods on MTF items, the type of IRM (Partial Credit Model (PCM) and Graded Response Model (GRM)) and the interaction between them on accuracy of estimating items and person's parameters. An achievement test contained (35) MTF items was constructed in Educational Psychology course for students of Faculty of Education at Umm Al-Qura University (411 students). The standard errors in estimating abilities parameters on this test and threshold parameters were estimated according to four different methods of estimating scores when using PCM and GRM, and standard errors in estimating discrimination parameters when using GRM. The results showed that there were effects for estimating scores method, type of IRM and the interaction between them in accuracy of estimating parameters of abilities and items thresholds parameters. Also there was effect of estimating scores methods on accuracy of items discrimination parameters using GRM.