Information Pathways in Online Science Communication: The Role of Platform Actors and News Media
Analysis of 1.24M tweets shows coordinated networks amplify anti-consensus experts, influencing news coverage.
A new study titled 'Information Pathways in Online Science Communication' by researchers Alexandros Efstratiou, Giuseppe Russo, and Luca Luceri provides a detailed map of how scientific information about COVID-19 flowed online. By analyzing a massive dataset of 1.24 million tweets and 211,000 news articles referencing pandemic-related scientific papers, the research reveals the complex interplay between credentialed experts, social media users, and traditional media outlets. The findings, accepted at the International AAAI Conference on Web and Social Media (ICWSM 2026), show that the most influential Twitter accounts in science discourse are predominantly individuals with medical or research credentials.
However, the study uncovers a critical finding: a coordinated network that disproportionately amplifies a small set of prominent, credentialed experts who advance contrarian, anti-consensus positions on vaccines, lockdowns, and related topics. The papers promoted by these influential actors substantially overlap with those covered by news media, but with key differences. Pro-consensus experts primarily engage with studies featured by mainstream and medical outlets, whereas contrarian experts align more closely with papers promoted by low-quality, pseudoscientific, or conspiratorial sources. Notably, the research indicates that news outlets tend to report on scientific studies *after* they have been highlighted by social media superspreaders, suggesting a reactive media cycle influenced by online amplification.
- Study analyzed 1.24M tweets and 211k news articles on COVID-19 science, finding credentialed experts dominate but a coordinated network amplifies contrarian voices.
- Contrarian experts promoting anti-vaccine/anti-lockdown views align with pseudoscientific sources, while pro-consensus experts engage with mainstream medical outlets.
- News media often reports on studies only after they are highlighted by social media 'superspreaders', revealing a reactive information pathway.
Why It Matters
This research provides a blueprint for understanding how misinformation networks operate and influence mainstream discourse on critical science topics.