خصائص الاختبار و فقراته التي يتم انتقاؤها لبناء اختبار محكي المرجع لتقدير علامة المجال وفق نظرية استجابة الفقرة

الملخص EN

This study aimed to know the properties of the criterion – referenced test and its items which are used to estimate the domain score according to the item response theory in measurement.

For this purpose, an achievement test was constructed in the mathematic s of eight class of the first semester of2014-2015.

the test consisted of (50) multiple choice items was applied on (460) students distributed into (12) classes.

The results revealed that (41) items fit rasch model assumptions, whereas (9) items where deleted because they didn’t fit rasch model assumptions.

The coefficients of reliability estimated for person and items were (.96) and (.88) respectively.

The test validity was ensured through several approaches.

The results also showed that the best items we choose to estimate the domain score are the items with intermediate difficulty because they are more precise to measure students achievement and also their standard errors are the least.

also we can choose small number of easy and difficult items to represent all the domain if there is a need.