Data collection strategy
T1–T3
In contrast to the initial plan of conducting one longer face-to-face session, data collection had to be adjusted due to contact restrictions following the Covid-19 pandemic. It is now taking place in two separate sessions, a longer online session followed by a short face-to-face onsite session. This procedure deviates from the prior data assessment at T1–T3 that took place face-to-face and in schools (two sessions per person, with a duration of around 50 min each). In PIER