ETS has always been committed to the quality of its test scores. As an ETS assessment program, TOEFL® strives to ensure score reliability and comparability through strict adherence to guidelines and practices established for
the development and operational implementation of its products and services. Evidence of score reliability and comparability is important because it suggests that test scores will have the same meaning across test forms. ETS strives to ensure that the test scores of the TOEFL Internet based test (iBT) are reliable and comparable by: