The purpose of this study is to understand student perceptions towards plagiarism and identify some factors influencing their plagiarist behaviour to be able to develop successful strategies to promote academic integrity and prevent plagiarism. Although academic dishonesty and plagiarism have been investigated by many researchers, psychometric qualities of these data collection instruments have generally been ignored, which has resulted in a shortage of standardized and validated questionnaires in the literature. Therefore, to address this issue the researcher ran a rigorous psychometric analysis on a previously developed and psychometrically evaluated questionnaire (Attitudes Towards Plagiarism). The modified instrument was conducted on 404 students studying in a private university in Kuwait in March 2022, representing the first administration of a psychometrically established plagiarism scale in the Kuwaiti context. The statistical analysis revealed that students' perceptions are significantly different according to the high school type they graduated from, their reasons for studying at the university, and their post-graduation career plans, whereas gender, major and year of study do not cause statistically significant differences.