the effect of using authentic based material on developing vocabulary knowledge of iranian intermediate extroverted and introverted learners

The present study was an attempt to investigate the effect of using authentic-based material on developing vocabulary knowledge of iranian intermediate extroverted and introverted learners. in order to perform this study, 90 iranian learners studying english as a foreign language who were conveniently sampled from pooyan language institute in semnan were selected. to choose a homogenous sample, the oxford quick placement test (oqpt) was administered to the whole sample. in the second step, the eysenck personality questionnaire (epq) was administrated to the learners and they were divided into two introverted and extroverted groups. at first, a pre-test of vocabulary was given to both groups to see the performance of the learners in vocabulary knowledge. then, treatment was commenced in 10 sessions. to perform this, the learners received the authentic passages extracted from the steps to understandings; intermediate level (hill, 1980). in the last session, the efl learners were given a post-test of vocabulary. at last, the independent and the paired samples t-tests were utilized to analyze the data by using spss software. obtained results showed that there was a statistically significant difference between extroverted and introverted efl learners who received authentic-based materials in developing vocabulary knowledge.