The Persuasion Paradox: How Expertise and Linguistics Shape Climate Communication

In their study, “The Persuasion Paradox: How Expertise and Linguistics Shape Climate Communication,” Chayasmita Deka (IIASA), Or Elroy (University of Oregon), Nadejda Komendantova (IIASA), and Abraham Yosipof (IIASA and College of Law & Business, Israel) examine how readability, complexity, and source credibility interact to shape engagement with climate content on X (formerly Twitter).

Experts write differently – and are heard differently

The analysis reveals a striking pattern. Tweets authored by experts were significantly more complex and less readable than those of the general public, particularly within scientific, anthropogenic, and conspiracy-related discussions. In the policy cluster, however, readability levels between experts and non-experts were comparable. Despite writing more complex messages, experts consistently attracted higher engagement. Their tweets received significantly more likes and retweets across thematic clusters, especially in scientific and policy discussions. Despite writing more complex messages, experts consistently attracted higher engagement. Their tweets received significantly more likes and retweets across thematic clusters, especially in scientific and policy discussions.

Cognitive biases and climate milestones

Temporal analysis around major climate-related milestones revealed notable spikes in expert activity and thematic shifts in discourse. . The findings suggest that engagement patterns are shaped not only by message content but also by cognitive biases such as authority bias, confirmation bias, and group polarization. These results underscore what the authors term a “persuasion paradox”: experts command authority and engagement, yet their more complex linguistic style may limit accessibility, potentially narrowing broader public understanding.

Implications for climate communication

The study contributes to a growing body of research examining how digital communication environments influence climate discourse. By integrating framing, expertise, and information-processing routes within a large-scale empirical dataset, the research highlights the importance of balancing scientific rigor with linguistic accessibility.

For policymakers, communicators, and scientists, the findings suggest that credibility alone is not sufficient. Effective climate communication in online environments requires attention to readability and cognitive processing dynamics to maximize engagement and broaden reach. The research provides timely insights into how climate narratives circulate and gain traction in digital spaces, offering practical implications for strengthening science communication and fostering informed public engagement in the face of escalating climate challenges