Table 1 Difficulty and power of discrimination
From: Long-menu questions in computer-based assessments: a retrospective observational study
Type of Item | n | Difficulty | Difference with Long-menu (95 % confidence interval) | Discrimination | Difference with Long-menu (95 % confidence interval) |
|---|---|---|---|---|---|
Type A | 140 | 75.69 ± 19.85 | -5.24a (-9.37 -1.11) | 0.222 ± 0.236 | -0.074a (-0.136 -0.013) |
Pick N | 201 | 78.72 ± 13.88 | -2.96 (-6.65 + 0.72) | 0.196 ± 0.214 | -0.104a (-0.159 -0.049) |
Long-menu | 212 | 81.57 ± 16.84 | 0.304 ± 0.284 | ||
All | 553 | 79.04 ± 16.82 | 0.244 ± 0.253 | . |