التحقق من افتراضي أحادية البعد واستقلالية القياس على الأداء التفاضلي وفق نظرية المنحنى المميز
This research aims to find out the effect of hypothetical one-dimensionality and independence of measurement on the differential performance of personality scales among university students. This has been achieved through objectives boss. The researcher followed the scientific steps to achieve the first goal in developing the narcissism scale according to the paragraph response theory. Starting with translating the scale items and instructions from English into Arabic, taking into account the accuracy and comprehensiveness of all the ideas in the scale, then the instructions and paragraphs of the scale consisting of (52) items were presented to an expert in the English language to ensure the veracity of the translation, and then the test instructions and its paragraphs were presented to an expert. A specialist in the Arabic language to ensure the linguistic integrity of the test, and after taking into account his notes. Then, by presenting the scale’s instructions and its paragraphs to arbitrators with specialization in educational and psychological sciences, to ensure that the appropriate characteristics of the scale’s paragraphs and their alternatives are available, in terms of form and content, and that they describe the measured trait, and after making some necessary modifications, all the scale’s paragraphs are considered valid for measuring what has been developed. in order to measure it. In order to ensure the clarity of the instructions and paragraphs of the scale in the research sample, and to determine the time required for performance, the scale was applied to a survey sample of (100) male and female students other than the statistical analysis sample, and it appeared that the instructions and paragraphs of the scale were clear, and the average performance time was determined (15) minutes. (Published abstract)