Background: There are scarce Iranian and worldwide research articles on designing the questionnaires of the factors influencing violence prevention. This indicates the need to design a specific questionnaire on factors affecting violence prevention and examine its psychometric properties before using it. Objectives: The present study aimed to design and evaluate psychometric properties (the reliability and validity) of factors affecting violence prevention questionnaire in female students. Methods: The current psychometric research was conducted in Rudsar, Iran during 2017 - 2018. In the first part (designing the questionnaire), data were collected from 50 participants by purposive sampling and using Waltz methodology. In the second part (evaluating psychometric properties of the questionnaire). The validity of the questionnaire was assessed using face, content, and structural validities. Reliability was evaluated using Cronbach’s alpha and intra-class correlation coefficient, and SPSS 20 software was used for data analysis. Results: The initial version of the questionnaire was designed with 212 items. After confirming the validity and reliability, the second version of the questionnaire was extracted with 56 items with an impact score of > 1.5 for all 56 items, the mean CVI = 0.94, and the mean CVR = 0.88. Concerning construct validity, 48 items were extracted with a predictive power of 38.16 based on exploratory factor analysis. The Internal Consistency of Reliability (α = 0.88; ICC = 0.92) was also confirmed. Conclusions: In general, the questionnaire represented acceptable reliability and validity for use in the student population. Therefore, the present questionnaire can predict the risk of violence against female adolescents.

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