الخصائص السيكومترية لمقياس التعرض للتنمر السيبراني لطلبة الجامعة باستخدام نموذج سلم التقدير لأندريش
The study aimed to investigate the psychometric properties of the Cyberbullying Victimization Scale among university students using the Andrich Rating Scale Model. The study sought to examine the fit of the data to the assumptions of Item Response Theory (IRT ), assess the extent to which the sample’s performance aligned with the Rating Scale Model, identify the maximum value of the item information function, determine the person separation index, and estimate the item locations on the scale. The sample consisted of 579 male and female students from King Saud University, Imam Mohammad Ibn Saud Islamic University, and Alfaisal University, during the first semester of the aca-demic year 1446 AH. The results supported the assumptions of the IRT model, with 22 items showing acceptable fit statistics. One item and 67 participants were excluded due to misfit. The item information function indicated that the scale provided the most information at the midpoint of the latent trait. The person separation index was 1.94, which is very close to the acceptable threshold. The person-item map revealed a logical distribution of individuals and items across the logit scale, reflecting a range of item difficulties and participant abilities. The study recommended using the scale to assess cyberbullying victimization and emphasized the importance of employing IRT-based models to enhance measurement quality. It also proposed future studies to examine differential item functioning (DIF) of the scale items based on gender and age group. (Published abstract)