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Despite the importance of having a reliable and valid measure of Second Language (L2) proficiency, L2 researchers of less commonly taught languages rarely have such a tool. Existing proficiency measures (e.g., DLPT, OPI) are often costly, labor-intensive, time-consuming, or unavailable to the public. With the intent to provide a practical and reliable measure of Korean L2 proficiency, this study attempted to develop and validate a 30-minute C-Test (Klein-Braley, 1981). This Korean C-Test was developed with the specifics of Korean language structure in mind, and Interagency Language Roundtable (ILR) skill-level descriptions were utilized in passage selection in order to test a wide range of participant proficiency levels. The resulting test and a self-assessment questionnaire (Kondo-Brown, 2005) were administered to 37 learners of Korean. Rasch analysis (Bond & Fox, 2007) was used to examine the reliability and concurrent validity of the measure, and Rasch measurement statistics such as separation reliability, difficulty measures, and model fit statistics were used to suggest further improvement to the C-Test. The developed test demonstrated excellent reliability and validity indices, and the results reveal the potential of this C-Test as a quick proficiency indicator.
Sunyoung Lee‐Ellis (Thu,) studied this question.