أثر اختلاف عدد البدائل الصحيحة في فقرات الصواب-خطأ المتعدد في دقة تقدير صعوبة الفقرات و قدرات الأفراد و ثبات الاختبار

الملخص EN

The present study aimed to examine the effect of the different number of correct alternatives in multiple true- false items on the estimation's accuracy of item's difficulty, individuals' abilities and test reliability.

To achieve the study aims, a 25 item multiple true - false achievement test in 8th grade mathematics was constructed .

The test included three forms according to the number of correct alternatives.

By using Winsteps program, responses of 2780 male and female students were analyzed for all the three test forms according to partial credit model.

The results of One-Way ANOVA revealed a significant statistical difference in the standard errors of means for difficulty of the items between the second form and both the first and third ones in behalf of the second form ( the number of correct alternatives=2).

The results revealed significant statistical differences in the means for the individuals' abilities between the second form and both the first and third ones in behalf of the second form.

Also the results revealed no significant statistical differences (α = 0.05) between the reliability coefficients for the three forms.