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Mean and SD and median and range of item difficulty and discrimination indices among all groups and for the control group across all 25 items.
|
|
Total | Control group | |||
|
|
Mean (SD) | Median (range) | Mean (SD) | Median (range) | |
| Difficulty index | 0.84 (0.16) | 0.92 (0.47 to 1.0) | 0.77 (0.25) | 0.86 (0.29 to 1.0) | |
| Discrimination index | 0.18 (0.18) | 0.12 (0.01 to 0.56) | 0.20 (0.29) | 0.07 (–0.20 to 1.0) | |
