Table 3.
Item statistics of knowledge subscale of ABCD.
| Nos. | Item | Difficulty index |
|---|---|---|
| 1 | Knowledge 1 | 0.915 |
| 2 | Knowledge 2 | 0.970 |
| 3 | Knowledge 3 | 0.936 |
| 4 | Knowledge 4 | 0.831 |
| 5 | Knowledge 5 | 0.983 |
| 6 | Knowledge 6 | 0.890 |
| 7 | Knowledge 7 | 0.852 |
| 8 | Knowledge 8 | 0.492 |
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