As a high-stakes standardized test, IELTS is expected to have comparable forms of test papers so that test takers from different test administration on different dates receive comparable test scores. Therefore, this study examined the text difficulty and task characteristics of four parallel academic IELTS reading tests to reveal to what extent…

The review presented and discussed in this paper explores the theoretical underpinnings and research findings of the washback of high-stakes tests in the field of language teaching and testing as well general education and suggests areas and ways of researching the phenomenon in the future. (Contains 1 figure and 1 table.)