| Explanation of student’s behavior | f | % |
| No explanation | 25 | 38.46 |
| Student | 23 | 36.39 |
| ・ Student’s difficult social background | 9 | 13.85 |
| ・ Student seeks attention | 6 | 9.23 |
| ・ Student’s bad personality | 5 | 7.69 |
| ・ Student’s need for approval | 1 | 1.54 |
| ・ Student’s giftedness | 1 | 1.54 |
| ・ Student’s fear of losing friends | 1 | 1.54 |
| Teacher | 14 | 21.53 |
| ・ Teacher’s behavior | 10 | 15.38 |
| ・ Teacher’s boring lessons | 4 | 6.15 |
| Rare explanations | 3 | 4.72 |
| ・ Class conspires with student | 1 | 1.54 |
| ・ Conspicuous behavior | 1 | 1.54 |
| ・ Psychosis triggered by wrong medication | 1 | 1.54 |
| Overall | 65 | 100 |