Tehran University of Medical Sciences Iranian Journal of Psychiatry 1735-4587 6 1 2011 03 15 19 24 Shahrum Vahedi Department of Educational Psychology, Faculty of Education and Psychology, University of Tabriz, Tabriz, Iran 2015 10 14 Objective: The present study examined the psychometric properties of the Persian version of the Revised Cheek and Buss Shyness Scale (RCBS) using confirmatory factor analysis among (n = 300) college students. Method: A total of 300 undergraduate students participated in this study And completed the Revised Cheek and Buss Shyness Scale (RCBS). A confirmatory factor analysis was performed to test diagnosis as a unitary construct and to test an earlier-reported two-factor model. Results: Results indicated that unidimensional measurement model of the RCBS did not provide the best fit for the data. Then three measurement models were tested, and the results showed that a two-factor model taking into account differences in the direction of item wording provided a satisfactory and parsimonious fit to the data. Multi-group confirmatory factor analysis was used to better understand the factorial invariance of the scale across genders, and indicated that two-factor structure of the RCBS was equivalent across genders. Supplementary t-tests revealed no other gender differences on shyness. Conclusions: The results provide initial support for the construct validity of the self- report version of the RCBS in college students. https://ijps.tums.ac.ir/index.php/ijps/article/view/334 https://ijps.tums.ac.ir/index.php/ijps/article/download/334/330