| No | Item | Strongly disagree (%) | Disagree (%) | Agree (%) | Strongly agree (%) |
| 1 | I know my strength in my investigation. | 0 | 8.7 | 69.6 | 21.7 |
| 2 | I know my weakness in my investigation. | 0 | 4.3 | 56.5 | 39.1 |
| 3 | I know why the wrong answer is wrong. | 0 | 17.4 | 69.6 | 13.0 |
| 4 | I know why the right answer is right. | 0 | 4.3 | 69.6 | 26.1 |