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This study investigates the effects of authentic materials and contextually developed role-playing activities on the oral proficiency of Thai undergraduate students. The study was conducted at Prince of Songkhla University, Thailand during the first semester (June to September) of 2010. The study consisted of four research instruments and the data were analyzed using Independent Samples t-test to determine whether the authentic materials and contextually developed role-playing activities had improved the students’ oral fluency and accuracy in the target language. The findings indicated statistically significant differences between the two groups, wherein the experimental group performed better on both fluency and accuracy than the control group. Therefore, based on the findings of the current study, it can be concluded that authentic materials and contextually developed role-playing activities involving a series of sequential events are effective in enhancing learners’ oral proficiency in programs of English as a foreign language in the context of Thailand English education.

The Effects of Authentic Materials Using Role-playing Activities on Oral Proficiency: A Case Study of Thai Undergraduate Students