A new multiple-choice question format more parallel to the knowledge quantity. Relationship between expected correct answer ratio and knowledge quantity.
- VernacularTitle:知識量をより反映する五肢複択形式試験 知識量と予想正解率との関係について
- Author:
Kenichi IKEBUKURO
- Publication Type:Journal Article
- Keywords:
multiple-choice questions;
expected correct answers ratio;
knowledge quantity
- From:Medical Education
1999;30(1):15-20
- CountryJapan
- Language:Japanese
-
Abstract:
In addition to the A-and K-type questions, the X2 type question has been introduced into, and the K'-type question has been eliminated from the Japanese Medical Licensure Examination since 1997. The expected correct answer ratio (ECAR) without any knowledge is 10% for the X2-type in contrast to 20% for the K2-type. However it still becomes 100% with an 80% knowledge. We designed a formula to study the relation between the knowledge quantity (KQ) and ECAR. The ECAR is 7%, 13%, 25%, 43%, 70%, and 100% for the X1, 2-type in which the number of answer (NA) is indicated as one or two, while it is 5%, 10%, 20%, 40%, 70%, and 100% for the X2, 3-type in which NA is indicated as two or three. The KQ difference between 80% and 100% can be reflected to ECAR in these types and considered to be the better question type.
