教員情報 | 大東文化大学

シズカ　テツヒト
靜　哲人外国語学部英語学科教授

■ 標題
VELC Test®短縮版の信頼性および基準関連妥当性の検証 ―項目数の漸減はテスト特性にどの程度影響を与えるか?―

■ 概要
The 90-item versions of the VELC® Test were recently developed based on their original 120-item versions by dropping 5 items from each of the 6 parts in such a way that the mean item difficulty of the whole test would remain unchanged. This study explored the reliability and the criterion-related validity of the newly launched 90-item versions, as well as hypothetical versions with still fewer items. Simulated 90-item data sets and those with gradually smaller number of items (from 84 to 6) were created based on actual 120-item VELC Test® response data sets produced by 130 students. Their TOEIC® L&R scores served as the criterion. Regarding the 90-item versions, it was found that they (1) correlated very strongly with the corresponding 120-item versions (r =.98 or higher), (2) exhibited very high reliability (alpha = .91 or higher), and (3) correlated with TOEIC® L&R practically as strongly as the full 120-item versions did. Regarding versions with smaller numbers of items, 48-item versions exhibited barely satisfactory measurement precision.
単著大東文化大学語学教育研究所『語学教育研究論叢』 (39),71-84頁 2022/03