Fig. 3
From: Very short answer questions: a viable alternative to multiple choice questions
Percentage distribution of the discrimination index of MTF, BAQ and VSAQ Percentage of questions (y-axis) and discrimination index categories (x-axis) Legend: MTF (blue), BAQ (orange) and VSAQ (ash) The percentages of year-3 and year-5 test items (combined) falling in 3 discrimination index categories are shown. MTF (20 items), BAQ (4-option, 15 items) and VSAQ (54 items Y-3 and 32 items Y-5) are combined for this figure. Different groups of students of the same batch participated in the study. The VSAQ papers were prepared by converting the MTF and BAQ questions. The bars show percentages of items falling in the three categories: ≤0.0 = no or negative discrimination; 0.1–0.19 = fair and ≥ 0.2 good and excellent distribution combined. Item analysis of VSAQ was manually performed on Excel Worksheet using the ‘UNIMAS Formulae’ [18]