الخصائص القياسية لمقياس أنماط الشخصية لدى طلبة الجامعة وفقا لأنموذج الاستجابة المتدرجة
The research seeks to verify the standard characteristics of the personality styles scale among university students according to the graded response model. In order to achieve the objectives of the current research, the researcher used the descriptive approach through a stratified random sample of Baghdad University students amounting to (1000) male and female students according to a set of demographic variables. The personality types scale was built according to the item response theory using the graded response model, and after following scientific procedures and steps for constructing tests and scales according to the item response theory, I started by defining the concept to be measured (Personality Type) and focused on defining its behavioral scope and identifying the personality types included in the scale by relying on based on the theoretical framework and definition developed by Holland (1997) according to his definition of personality types, then logical and statistical analyzes were conducted to verify the assumptions of the item response theory, and the standard characteristics of the items and the total scale were calculated, and using the statistical program (GGUM-2004), the model assumptions were verified according to the scale data. All items and the scale enjoyed good standard characteristics, and the scale enjoyed appropriate standard characteristics at the level of the paragraph and the scale as a whole. (Published abstract)