11 February, 2026. The Swiss news portal Nau.ch recently published an in-depth interview with Prof. Dr. Susanne Walitza, one of the leading Swiss investigators for the Europe-wide, EU-funded BootStRaP study. This international research project investigates Problematic Usage of the Internet (PUI) and its risks to adolescent mental health. Although the specific study acronym is not explicitly mentioned in the press article, the expert insights provided by Professor Walitza directly reflect the core focus and research goals of the BootStRaP initiative.
In her interview, Professor Walitza explains that intense or unhealthy screen habits can quickly make existing, subtle ADHD symptoms much worse. Surprisingly, this behavior can cause similar focus and concentration struggles even in teenagers who do not have the condition at all. Young people with untreated ADHD are also much more vulnerable to falling into unhealthy digital habits in the first place. According to the psychiatrist, parents and teens should worry when screen time starts cutting into sleep, daily chores are pushed aside, or when putting the phone down brings real frustration and discomfort.
Interestingly, the mental health toll comes less from the hours spent looking at a screen and more from the content itself. Constantly scrolling through unrealistic beauty standards on social media or stumbling upon violent videos triggers the highest levels of anxiety and depressive symptoms. Even so, Professor Walitza believes strict digital bans are not the answer. Online spaces help teenagers stay connected and escape from school pressure. Instead of trying to lock devices away, the focus should be on teaching digital literacy and building safer, healthier online environments.
Original Source & Reach. The full interview is available in German on the Swiss news portal: Nau.ch: Games, Tiktok und Co: Handy kann ADHS-Symptome «wecken». As one of Switzerland’s major national news outlets, Nau.ch reaches an audience of 3.5 to 4 million unique clients per month. 
Photo of Prof. Dr. Susanne Walitza / Photo credit: PUK