الخلاصة:
هدف البحث إلى تحديد أثر عدد البدائل لاختبار تحصيلي لمادة العلوم الطبيعية على خصائص السيكومترية، حيث تم بناء ثلاثة النماذج لاختبار تحصيلي يتكون من 20 فقرة وتختلف في عدد البدائل، حيث تم التأكد من الخصائص السيكومترية ليتم بعدها تطبيق النماذج الاختبار التحصيلي على 520 تلميذا بالسنة الرابعة متوسط، بينت النتائج وجود فروقا بين النماذج الثلاثة للاختبار في مستوى الصعوبة ، كما أظهرت عدم وجود فروق بين النماذج الثلاثة للاختبار في مستوى التمييز، وعدم وجود فروق بين النماذج الثلاثة في معاملات الصدق ومعاملات الثبات
The aim of this research is to determine the impact of the number of alternatives to a learning test of natural sciences on its discriminatory ability and sequemetry characteristics, and to achieve the research objectives the researcher built a multi-choice test for fourth-year students average in the first and second suppliers of the first field of the first chapter of the second generation curriculum of the natural sciences subject for the 2020/2021 school year, and the attainment test in its initial form of (25) items and each items five alternatives, and then deleted two items After the opinion of the arbitrators, the test was applied to a reconnaissance sample of 60 pupils, and then the difficulty and discrimination factors for these items were calculated, and in the light of the results of the survey three items were deleted where difficulty and discrimination factors were low, the stability factor was (0.871), and accordingly three models of attainment test were formed equal in the number of items and different in the number of alternatives, the first model consisted of five alternatives and the second consisted of four alternatives to delete One of the randomly camouflaged of each of the five-alternative model items, and the third form consists of three alternatives by randomly deleting one of the camouflages from each of the four-substitute model items.
