Aims: People enter to the learning environment with individual differences in the e-learning, so they are very different from each other in the learning yields assessment. This study aimed to investigate the effect of introversion and the extraversion personality types on the participation of learners in the Moodle learning management system.

Methods: This causal-comparative study was done on 86 Master of Sciences students in the second semester of law and political science of Allameh Tabatabai University in 2013. The subjects were selected by stratified random method based on Krejcie and Morgan table. They performed some exercises in the cyberspace to the computer acquaintance lesson. The Eysenck (introversion, extroversion) and Rabryka Personality Questionnaire were used. Data were analyzed by SPSS 19 software using independent-T and the Two-way ANOVA tests.

Findings: No significant difference was observed between girls and boys scores in terms of introvert and the extrovert personality traits, as well as the participation rate. But the mean scores of students’ participation in extroverted and introverted personality traits was significantly different. Interaction between personality trait and the gender was not significant on the level of student participation (p>0.05).

Conclusion: In the e-learning environment, introvert subjects more participate than extrovert subjects. In other words, in the e-learning, introvert subjects more participate in the activities and interactions.