Conclusion
The International English Language Testing System would seem to be a relatively
reliable measure of language proficiency. Unlike other tests, such as the TOEIC which only
tests listening and reading, IELTS is a comprehensive test with high content validity which
some might consider important if trying to assess real-life language proficiency. In order to
establish greater reliability and validity, more independent research is needed if the test is to
continue to effectively measure overall proficiency in English