Crafting Item Difficulty in TOEFL iBT Listening Tests.

The article focuses on the process of crafting item difficulty in TOEFL iBT Listening tests, emphasizing the complex interplay between item characteristics and a diverse international test taker population. It outlines key difficulty drivers related to the text (such as topic accessibility and vocabulary frequency), the recording of the text (including speech rate, speaker emphasis, and pauses), and the test questions themselves (item type, distracter attractiveness, and question clarity). The author highlights the importance of balancing these factors to create items that accurately discriminate among test takers' listening abilities, particularly near university admissions cut scores, while ensuring fairness and validity. Examples illustrate how manipulating these elements affects item difficulty and test taker performance.