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Results of the descriptive statistics of emotional engagement.
| Data sources | Dimension of measurement | Question feedback | Sample size | Average value | Standard deviation |
| Questionnaire | Emotional engagement | No feedback | 30 | 23.97 | 3.94 |
| Simple feedback | 30 | 22.63 | 3.21 | ||
| Elaborated feedback | 31 | 23.48 | 3.36 | ||
| Brain wave instrument | Relaxation level | No feedback | 30 | 51.02 | 5.05 |
| Simple feedback | 30 | 56.55 | 6.40 | ||
| Elaborated feedback | 31 | 55.18 | 5.38 |
