بناء اختبار تحصيلي مقالي في مادة الكيمياء للصف الثاني الثانوي وفق نموذج التقدير الجزئي لنظرية استجابة الفقرة
The study aimed to construct an essay achievement test in chemistry for the second year of secondary science. According to the partial estimation model of item response theory; It is based on the analytical descriptive research methodology, and the study tool was an essay achievement test for the chemistry course for the first semester For the second secondary grade, it consisted in its final form of (12) questions and (50) steps - designed by the researcher - it was applied to a random sample of (451) male and female students from the second secondary grade in Saudi government schools in Al- Madinah Al-Munawwarah region, for the academic year (1444 AH), and the following statistical methods were used: exploratory factor analysis to detect one-dimensionality, and the use of (Easy Estimation) program to answer the study questions Speed, as the results showed that there is a match between the test items with the partial estimation model, and the validity and reliability of the test were verified, as the stability coefficient for individuals and the empirical stability coefficient for the items according to the partial estimation model, respectively, reached (0.91, 0.94), which indicates the ability of the test is in separating the abilities of individuals, and distinguishing between their abilities on the continuum of the trait, and in the light of the previous results, the researcher presented a number of recommendations, the most important of which are: urging specialists in the field of developing and designing psychological and educational measures using individual response models in preparing and developing them. (Published abstract)