摘要：The construct validation of a multiple-choice listening test requires some evidence that text and text associated variables play a significant role in predicting item difficulty. The purpose of this study is to investigate the effects of task features on test performance in EFL listening tests by determining how well item difficulty can be accounted for by text factors, item factors and text-item factors. A sample of 159 items of CET listening tests was analyzed, based on which a summary of task features of CET listening passages is presented. Furthermore, the results of correlation and regression analyses indicate that text-by-item interaction variables contribute significantly to item difficulty, thereby providing evidence favoring the construct validity of CET listening tests. Two best predictors of item difficulty are the redundancy of necessary information, and lexical overlap between words in the text and words in an item's options.
