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People are increasingly turning to social media platforms to acquire information and seek advice on health matters. Consequently, a growing number of qualified healthcare professionals are using social media as channels for public health communication. On platforms such as YouTube and Instagram, health workers can reach a wide and interested audience while applying powerful tools for presentation and interaction. However, such platforms also represent certain challenges and dilemmas when doctors and psychologists become health influencers. Who do they represent? What style of communication is expected? And what responsibilities do they have toward their followers? The present study contributes to the field of investigation by employing qualitative methods. It is based on three focus group interviews conducted with students enrolled in health-related study programmes at Norwegian universities. The paper asks: How do future healthcare workers perceive the social media practices of popular healthcare experts regarding the advantages and dilemmas associated with such practices?

There are many different notions of models in different areas of science that are often not aligned, making it difficult to discuss them across disciplines. In this study, we look at the differences between physical models and mental models as well as the difference between static and dynamic models. Semiotics provides a philosophical underpinning by explaining meaning-making. This allows for identifying a common ground between models in different areas. We use examples from natural sciences and linguistics to illustrate different approaches and concepts and to find commonalities. This study distinguishes between systems, models, and descriptions of models. This distinction allows us to understand the commonalities of mental and physical models in different areas.