Objective - The present study was designed to compare online self-disclosure between Polish and Indonesian Facebook users. We expected that Need for Popularity (NfP), Collective Self-Esteem (CSE), perceived network size and diversity, as well as controlling accessibility, will influence online self-disclosure in both countries. Furthermore, we examined the differences in privacy issues.

Methodology/Technique - Pearson's correlation and hierarchical regression analysis were performed to address the differences of online self-disclosure regarding independent variables. An Independent t-test was conducted to compare the control of accessibility of profile information between the two countries.Chi-square analysis was carried out to observe the differences in perceived privacy. The sample of this study consisted of 280 Indonesians and 284 Poles.

Findings - Indonesians and Poles showed significantly different results when it comes to online self-disclosure, with consideration to psychological determinants. Poles exhibited a higher need to control the accessibility in their profile information, except for information on instant messaging accounts, which was deemed more sensitive for Indonesians. Poles showed a higher level of perceived privacy regarding almost all personal information on their profile page.

Novelty - It was very few articles discussing the comparison of the psychological determinants of online self-disclosure and privacy issues between Polish and Indonesian.

Type of Paper - Empirical

Keywords : Online Self-Disclosure, Need For Popularity, Collective Self-Esteem, Perceived Privacy.