The aim of the present study is to investigate the impact of cultural collectivism on knowledge sharing among information technology majoring undergraduates in Turkey. The study proposes a research model based on the theory of reasoned action (TRA). A structural equation model was used to test the research model against the data collected by means of a self-report questionnaire. Results show that cultural collectivism has a positive and significant impact on attitudes toward and subjective norms with regard to knowledge sharing. Confirming the TRA, results also suggest that behavioral intentions are jointly determined by attitudes and subjective norms. Implications of these findings are discussed. (C) 2015 Elsevier Ltd. All rights reserved.