Especially as an indicator of one social media platform vs another, it seems unwise in its design. Essentially, it appears that they are trying to gauge each platform's impact on young people's mental state by...asking those young people to guess at the answer. Hmmm...problematic as it is to ask someone (young or not) to evaluate their own mental state, asking them to evaluate which social media platform that they use is responsible for that, seems even more problematic. This does not look like the world's best experimental design, even with the same budget you could have done better.
