4.2. Mental Health
SECONDARY
Regarding the results on mental health indicators (i.e., psychological distress, life satisfaction, and loneliness), we found no significant effects over the full three-year period. However, the students in all three groups consistently reported an increasing level of psychological distress, while only the control group reported a significant decrease in life satisfaction during upper secondary school. Previous research on life satisfaction has found drastic decreases during the adolescent age [