An-Najah University Journal for Research - B (Humanities)


This study aimed at verifying the effect of the guessing on the items parameters, person’s ability and information function. To achieve this aim, a 30 item multiple – choice achievement test. The test had three different forms according Processing Guessing Effect. The responses of 200 examinees on the three forms were analyzed by Bilog–Mg3 programs according to the three parameter logistic model The results of two-way ANOVA revealed significant statistical differences between the means of item difficulty parameters. No Differences were found, however, between the means of item discrimination and the means person’s ability parameter.