Differential item function using the Rush-Mantel-Haenszel method in the inventory of the big five factors of personality

The aim of the current research is to detect the items with differential function in the inventory of the five big factors of personality, Translated by Bushra Ismail Ahmed (2013), according to gender (male/female). To investigate the hypothesis of the research, a random sample of students from the Faculty of Education, Minya University in the academic year 2022/2023 was selected, consisting of 770 ( 245 male and 525 female students). The inventory consisted of 32 items, was applied. The results of the research using the Rasch-Mantel-Haenszel method revealed the presence of 6 items with differential function, three of items in favor of females: item 1, which belongs to the extroversion factor, with strong differential function - item 22, which belongs to the openness factor, with strong differential function - and item 23, which belongs to the extroversion factor, with average differential function, and three items are in favor of males: item 2, which belongs to the factor of neuroticism, with average differential function - item 11 which belongs to the openness factor with average differential function - and item 14 which belongs to the conscientiousness factor with average differential function. Since identifying item with differential function is the first step to detecting item bias, it is recommended to conduct follow-up research to detect item bias with differential function in ways other than quantitative methods.