Analysis of Results After Introduction of X Type Questions

• Published in: Igaku Kyoiku / Medical Education (Japan) Vol. 29; no. 4; pp. 209 - 213
• Main Authors: TANAKA, Naomi, MORITA, Rinko, KUSAKARI, Jun, IKEBUKURO, Kenichi, BANNAI, Shiro, KUBO, Takeshi, MITSUI, Toshio
• Format: Journal Article
• Language: Japanese
• Published: Japan Society for Medical Education 1998; 日本医学教育学会
• Subjects: discrimination power; estimated quantity of knowledge; K形式; multiple-choice questions; national board examination; X type; X形式; 五肢複択形式; 医師国家試験; 推定知識量; 識別指数
• ISSN: 0386-9644; 2185-0453
• DOI: 10.11307/mededjapan1970.29.209

X type questions have been used for the national medical licensing examination since 1997. At Tsukuba University, X type questions have been used since 1996. We compared X typeand K type questions on the basis of the percentage of correct answers and discrimination power. The average percentage of correct answers was 68.2% for K type questions and 53.1% for X type questions. However, the average discrimination power was +0.227 for K type questions and +0.257 for X type questions. These results indicate that X type questions are more difficult and are suitable for achievement tests. The estimated knowledge quantity was 2.04 for K type questions and 2.32 for X type questions. This suggests that the person writing the questions decreased the essential difficulty of X type questions.