Objective: To determine the validity of the Thai version of the Bergen Facebook Addiction Scale (Thai-BFAS) using Facebook
addiction screening in Thai high school students.
Material and Method: The original BFAS was authorized for translation and validation in Thai. After content validity and
usability were approved by three Thai psychiatrists, the Thai-BFAS was adjusted again by the authors and back translated by
an English expert. This final version was investigated using the internal consistency method among 874 high schools students
in Bangkok, Chiang Mai, Ubon Ratchathani and Songkhla, and confirmatory factor analysis (CFA) was employed to prove that the six-component model could be representative of addiction behaviors. In addition, test-retest reliability was performed
separately among 30 pilot high school students in Bangkok.
Results: The Thai-BFAS has six items, which are each scored on a 5-point scale with total score ranges from 0 to 24; the cutoff score for Facebook addition stands at least 12 points. The Cronbach’s alpha coefficient was 0.91 (95% CI; 0.90, 0.92) and
the inter-class correlation coefficient was 0.80 (95% CI; 0.49, 0.92). The CFA showed that the six items accurately represent
the six-component model of addiction such as salience, mood modification, tolerance, withdrawal, relapse and conflict.
Conclusion: The Thai-BFAS is consistent as a screening test for Facebook addiction among high school students due to good
reliability and validity. It also conforms well to the original version. The six items in the Thai-BFAS are a good representation of the addiction behaviors. Further studies should be undertaken in cases of sensitivity and specificity when compared with other similar tests of addiction as well as in various additional populations and circumstances.

Keywords: Validation, Bergen Facebook Addiction Scale, High school students