A comparison of Mantle- Hansel and Raju's Signed Area Measure Index Method for Detecting performance of Item of the Thinking Styles in the light of Mental Self Government Theory of Sternberg Among of university students

The study aimed to comparison of Mantle - Hansel (MH) chi-square and Raju's Signed Area index (RSAI) between the curves of the item properties with the (2PLM) Methods for Detecting Differential performance of item of Thinking Styles Test considering Sternberg Theory Among of university students. It also aimed to find out the extent of agreement between the two methods of detecting (DIF) according to gender variable. The test included (65) items and the sample consisted of (394) students of University of Technology and Applied Sciences. here are the most important findings: Uniform DIF was detected in (3) items, equal (4.6%) using (MH) method; two items favouring male group, and one item, favouring female group, but when using the (RSAI) method, a uniform DIF was detected in two items, equals (3.07%); one item, favouring male group, and one item, favouring female group. The percentage of agreement between the (MH) and (RSAI) methods was high, as the two methods reveal two items at a rate of (70%) out of (3) items that showed (DIF) due to gender variable. Moreover, the value of the coefficient of agreement kappa (0.513) and is considered a substantial agreement, the qualitative analysis that carried out to the three items having uniform (DIF) revealed that the difference in gender between male and female may result in showing uniform (DIF) in these items.