Reliability and Validity of the Vietnamese Cyberbullying Scale (CBS) Among University of Medicine and Pharmacy, Vietnam National University Students

Background: The proportion of individuals utilizing the Internet has increased rapidly, and as a result, cyberbullying has garnered significant attention across various communities, emerging as a critical public health concern. Objective: This study aimed to validate the Vietnamese version of the Cyberbullying Scale (CBS) within the Vietnamese context. Methods: A cross-sectional study was conducted with 257 students at University of Medicine and Pharmacy, Vietnam National University (VNU-UMP) in Hanoi , Vietnam, from November 2023 to March 2024. The Cyberbullying Scale was administered through the RedCap software platform.Results: Among the 257 students, 64.9% were female. The average time spent using social networks per day was 5.6 ± 3.3 hours. The factor loadings for all items ranged from 0.76 to 0.92. The Cronbach’s Alpha coefficient was calculated to be 0.98. The final measurement model of the CBS-M demonstrated good fit with the data, yielding acceptable fit indices: Comparative Fit Index (CFI) = 0.93, Tucker-Lewis Index (TLI) = 0.91, Standardized Root Mean Square Residual (SRMR) = 0.03, and Root Mean Square Error of Approximation (RMSEA) = 0.06. Conclusion: The Cyberbullying Scale was identified as a reliable and valid instrument for assessing cyberbullying in Vietnam.