Iranian Journal of Nursing and Midwifery Research1735-906625420200618314318EN1.Department of Medicine, Quran and Hadith Research Center, Tehran, IR Iran, Department of Nursing Faculty, Baqiyatallah University of Medical Sciences, Tehran, IR Iran1.Department of Medicine, Quran and Hadith Research Center, Tehran, IR Iran, 2.Department of Nursing Faculty, Baqiyatallah University of Medical Sciences, Tehran, IR Iran,Behavioral Sciences Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR IranAssistant Professor in Nursing Education, Exercise Physiology Research Center,Life Style Institue and Nursing Faculty, Baqiyatallah University of Medical Sciences, Tehran, IR Iran2020062120200621<p><strong>Background: </strong>Regarding the importance of mentoring in nursing and lack of attention to this issue, as  well as the lack of a suitable questionnaire to assess mentoring, this study was carried out to design  and analyze psychometric properties of mentoring among bachelor’s degree students in nursing.</p><p><strong>Materials and Methods: </strong>In a mixed method study, the validity and reliability of the Mentoring  Questionnaire were measured after designing it. The study sample included all undergraduate nursing  students of one of the nursing schools in Tehran, Iran. In the qualitative phase, item generation,  face, and content validity were performed. In the quantitative phase, construct validity and reliability  were performed. The Cronbach’s alpha coefficient and Interclass Correlation Coefficient (ICC) test  were exploited for data analysis and reliability assessment, respectively.</p><p><strong>Results: </strong>The number of  items designed for the Mentoring questionnaire was twenty. Finally, the Mentoring Questionnaire  was designed with 16 items. The Cronbach’s alpha coefficient of the Mentoring Questionnaire  was 0.96. In addition, the results of the ICC showed the high reliability of the Mentoring  Questionnaire (ICC = 0.99). The indices derived from Exploratory Factor Analysis (EFA) revealed  that the Mentoring Questionnaire had appropriate construct validity.</p><strong>Conclusions: </strong>Given the results  of this study, as well as the importance of mentoring measurement among nursing students and the  lack of access to a valid questionnaire, it can be concluded that the Mentoring Questionnaire is a  useful tool for bachelor’s degree nursing students.http://ijnmr.mui.ac.ir/index.php/ijnmr/article/view/1727http://ijnmr.mui.ac.ir/index.php/ijnmr/article/download/1727/70707297