Objective of the study is to adapt of an English-language methodology that reveal the level of ag-gression and victimization in a school bullying situation on a Russian-language sample. Background. Bullying is one of the most serious problems of interpersonal relations at school. Results of previous research suggest negative consequences of bullying for its participants. According to statistics, every third child in Russia is subjected to bullying at school. Nevertheless, the problem of

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... remains scarcely explored, hence there is a problem in the lack of reliable methods for measuring that construct. Study design. The procedure for adapting the English-language Revised Olweus Bully/Victim Questionnaire methodology consisted of direct and reverse translation, conducting cognitive interviews and surveys, as well as statistical processing stages. Participants. The sample included 833 respondents from 10 to 18 years old, with an average age of 16. 57% of them (473 respondents) are male, and 43% (360 respondents) are female. Methods. Сonfirmatory factor analyses and analysis of internal consistency were conducted for data analysis. The R software was used for data processing. Results. Good performance of confirmatory analysis and analysis of internal consistency confirm the correspondence of the structure of the adapted methodology to the original one and indicate the presence of reliability-consistency. The adapted version of the questionnaire includes 2 scales: victimization and aggression, each of which includes 8 statements, which are evaluated on a 5 — point scale. Conclusion. The adapted method is reliable and valid and can be used for both research and applied purposes in Russian schools.