| Categories | Frequencies | Absolute frequencies (the total) | Absolute frequencies (without non codable) | Total absolutee frequencies/ intensity level |
| DB level 1 (n = 604) | ||||
| Distracted | 148 | 7.7% | 10.7% | 43.7% |
| Nattering | 308 | 16.2% | 22.3% | |
| Late | 84 | 4.4% | 6.1% | |
| No costume | 20 | 1% | 1.4% | |
| Leaving the room | 44 | 2.3% | 3.2% | |
| DB level 2 (n = 644) | ||||
| Fooling around | 52 | 2.7% | 3.8% |
46.7% |
| Squabbling | 168 | 8.8% | 12.1% | |
| Bullying | 112 | 5.8% | 8.1% | |
| Making noise | 120 | 6.3% | 8.7% | |
| Deforming the activity | 84 | 4.4% | 6.1% | |
| Breaking the rules intentionally | 84 | 4.4% | 6.1% | |
| Giving up practice | 24 | 1.2% | 1.8% | |
| DB level 3 (n = 131) | ||||
| Criticizing | 52 | 2.7% | 3.8% | 9.6% |
| Lashing out at material | 38 | 2% | 2.8% | |
| Mugging | 25 | 1.3% | 1.8% | |
| Dangerous behavior | 00 | 0% | 0% | |
| Being rude | 16 | 0.8% | 1.2% | |
| Ridiculing | 00 | 0% | 0% | |
| Resisting instructions | 00 | 0% | 0% | |
| Total without non-codable | 1379 | 72.6% | 100% | -- |
| Non-codable | 521 | 17.4% | -- | -- |
| Total | 1900 | 100ù | -- | -- |