Postexamination item analysis of undergraduate pediatric multiple-choice questions exam: implications for developing a validated question Bank.

Abstract

Item analysis (IA) is widely used to assess the quality of multiple-choice questions (MCQs). The objective of this study was to perform a comprehensive quantitative and qualitative item analysis of two types of MCQs: single best answer (SBA) and extended matching questions (EMQs) currently in use in the Final Pediatrics undergraduate exam. A descriptive cross-sectional study was conducted. We analyzed 42 SBA and 4 EMQ administered to 247 fifth-year medical students. The exam was held at the Pediatrics Department, Qena Faculty of Medicine, Egypt, in the 2020-2021 academic year. Quantitative item analysis included item difficulty (P), discrimination (D), distractor efficiency (DE), and test reliability. Qualitative item analysis included evaluation of the levels of cognitive skills and conformity of test items with item writing guidelines. The mean score was 55.04 ± 9.8 out of 81. Approximately 76.2% of SBA items assessed low cognitive skills, and 75% of EMQ items assessed higher-order cognitive skills. The proportions of items with an acceptable range of difficulty (0.3-0.7) on the SBA and EMQ were 23.80 and 16.67%, respectively. The proportions of SBA and EMQ with acceptable ranges of discrimination (> 0.2) were 83.3 and 75%, respectively. The reliability coefficient (KR20) of the test was 0.84. Our study will help medical teachers identify the quality of SBA and EMQ, which should be included to develop a validated question bank, as well as questions that need revision and remediation for subsequent use.