The Psychometric Properties of Five Scoring Methods Applied to the Script Concordance Test

Abstract

Single-best-answer scoring with three answer choices produced results similar to aggregate scoring on a Likert-type scale. Because SCT items appear to assess an examinee's understanding of the interrelatedness of medical knowledge, single-best-answer scoring on an SCT may be valid as an educational assessment. More research is needed to assess differential validity compared with multiple-choice question exams and the predictive validity related to clinical performance.