Table 3.
Parameter changes related to different numbers of distractors (expert recommendation)
| Specialty | Model | % correct (P-value)* | Discrimination* | Reliability* | Standard. Reliability** |
|---|---|---|---|---|---|
| Internal Medicine, Pharmacology (55 items)* |
4 distractors | 78.93 | 0.19 | 0.74 | 0.84 |
| A) 3 distractors, random |
79.49 | 0.19 | 0.73 | 0.83 | |
| B) 3 distractors, right answer | 81.21 | 0.16 | 0.66 | 0.78 | |
| C) 2 distractors, random |
81.08 | 0.17 | 0.69 | 0.80 | |
| D) 2 distractors, right answer | 85.07 | 0.11 | 0.53 | 0.67 | |
* These indicators related to the sample of positive A-type questions only, thus they differ from the respective indicators relating to the complete examination including negative best answer and extended matching questions.
** Reliability standardised for 100 items