Credibility Assessment in Online Health Communication

Rapid expansion of digital platforms has transformed the way individuals seek and share health information, creating both opportunities and challenges for public health. Users now encounter a multitude of sources—from government health agencies and medical professionals to peer-generated content and commercial influencers—each carrying signals of expertise, trustworthiness and authenticity. Credibility assessment in this context involves both systematic evaluation of evidence and heuristic cues such as domain names, design features, user engagement metrics and endorsements. Message-framing strategies, including emphasis on psychological benefits or logistical facilitation, interplay with source characteristics to shape perceptions of believability and influence behavioural intentions. Cultural norms, platform algorithms and cognitive shortcuts further mediate credibility judgements, leading to varied patterns of trust and information uptake across regions and demographics. Rigorous assessment frameworks that integrate behavioural science, communication theory and human–computer interaction are essential to counter misinformation, foster informed decision-making and guide the design of interventions that enhance the reach and impact of reliable health guidance globally.

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Credibility Assessment in Online Health Communication publication trend

The graph below shows the total number of articles in credibility assessment in online health communication across all publications each year (not limited to Nature Index journals).

Technical terms

Source credibility: The extent to which an information originator is perceived as expert and trustworthy.

Message framing: Presentation of information emphasising particular aspects (eg, psychological benefits or logistical details) to influence perception and action.

Heuristics: Mental shortcuts or rules of thumb used by individuals to make quick credibility judgements under uncertainty.

Authenticity: Perceived genuineness and sincerity of information, reflecting alignment of content with real-world evidence and communicator intent.

References

1. Using Short-Form Videos to Get Clinical Trial Newcomers to Sign Up: Message-Testing Experiment. Journal of Medical Internet Research (2024).
2. How Information Contributors Establish High-Credibility Online Health Information. IEEE Access (2025).
3. Assessing the Credibility and Authenticity of Social Media Content for Applications in Health Communication: Scoping Review. Journal of Medical Internet Research (2020).