Abstract
If tests are to provide an accurate measure of learners’ language abilities, examiners must minimize the influence of intervening factors such as text organization and response format on test results. The purpose of this article is to investigate the effects of these two factors on second language learners’ performance in reading comprehension tests. The study analyses the results of reading comprehension tests which were delivered to 754 Japanese university students. The main finding is that text organization and test format had a significant impact on the students’ performance. When texts were clearly structured, the more proficient students achieved better results in summary writing and open-ended questions. By contrast the structure of the text made little difference to the performance of the less proficient students. This suggests that well-structured texts make it easier to differentiate between students with different levels of proficiency. Examiners have hitherto taken little notice of the impact of text structure and test format on students’ results. By paying more attention to these factors, they will enhance the validity of their tests.
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