Introversion has the greatest chance of negatively affecting SLA. Students who are afraid of embarrassing themselves by speaking poorly or not being able to speak at all may try to avoid opportunities that would otherwise facilitate their learning (Zhang, 2008). Since 1960, personality has become a major area of ​​specialization among doctoral students. (Vance and Macphail, 1964). Much research has been done, followed by literature on various personality theories. The emphasis on individual differences and the distinctiveness of the individual are the most common features of the study of personality. There is a guarantee that each person's profile is different from that of another person and therefore each person has a unique personality (Allport and Odbert, 1936). However, the question is how to determine personality? In general, the simplest approach to doing this was to look at individual differences. However, the validity and reliability of such observation may be questioned because it is not efficient and systematic enough. On the other hand...