Many people feel overwhelmed by daily constant connectivity on social media, to the extent that it may affect their sleep quality and daily focus. Researchers are planning a self-report study to investigate the effects of a weekend 'digital detox' (completely refraining from using smartphones and social media). They intend to ask participants open questions about their experiences during the detox and how they felt about their social interactions and focus after returning to screen use.
Outline one weakness of the use of open questions in this study.