| Value | Category | Cases | |
|---|---|---|---|
| 1 | Difficult to understand and boring | 37 |
8.1%
|
| 2 | Easy to understand but boring | 68 |
14.8%
|
| 3 | Difficult to understand but interesting | 113 |
24.7%
|
| 4 | Easy to understand and interesting | 240 |
52.4%
|
| Sysmiss | 566 |