“…While a number of studies have looked at the validity of the OPI and the use of its scale in oral proficiency testing (Dandonoli & Henning, ; Halleck, ; Surface & Dierdorff, ; Thompson, , ), little empirical research has specifically sought to document examinees’ strengths and weaknesses at each sublevel within a major level, primarily because the single holistic rating of the speech sample as a whole results in a lack of transparency about exactly what such a rating means and on which dimensions a test taker showed strength or weakness. Thus, while the small percentage of instructors who have received formal OPI training can intuit the reason their students may have received a particular score, the large number of instructors who have less familiarity with the scale may: - fail to understand the conjunctive nature of a proficiency rating (Clifford, ),
- overestimate their own students’ abilities (Levine & Haus, ), or
- confound the performance of rehearsed material with proficiency (Cox, Bown, & Burdis, ).
…”