The intervention group received the one workshop per week for 7 weeks. Each workshop combined artistic creation and group philosophical inquiry on a certain theme related to climate change (e.g., responsibility, hope, the beauty of nature)

This intervention combined creative arts workshops using drawing, photography, painting and collage to introduce a theme related to climate change and promote emotional expression. The artistic creation was followed by a philosophical inquiry group discussion on a theme related to the artistic creation to allow critical thinking and sharing perceptions.

The Coping with Climate Change Scale for Adolescents developed by Ojala (2012) uses a Likert-type scale (0 = not true at all for me; 4 = completely true for me) to measure three coping dimensions (problem coping, avoidance coping, and meaning coping). Lower scores represent less usage of this coping strategy, while higher scores indicate high usage of this coping strategy.

The Hogg Eco-anxiety Scale (2021) was adapted to children by making the language more accessible. The scale is rated on a 4-point Likert type scale (0 = Never, 3 = Almost every day), and higher scores indicate higher eco-anxiety (worst outcomes).

The Distress Intolerance Index for Youth (Keller, 2019) uses a 5-point Likert type scale (0 = Not at all true for me to 4 = Very true for me), and higher scores indicate higher intolerance to distress (worst outcome).