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Scientific-Consensus Communication About Contested Science: A Preregistered Meta-Analysis.

Aart van Stekelenburg¹, Gabi Schaap¹, Harm Veling¹

¹Behavioural Science Institute, Radboud University.

Psychological Science

|October 15, 2022

Summary

Communicating scientific consensus helps bridge the belief gap. Even one message improves public perception of scientific agreement and belief in facts on debated topics.

Keywords:

belief climate change genetically modified food meta-analysis open data preregistered science communication scientific consensus scientific facts vaccination

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Area of Science:

Environmental science
Public health
Agricultural science

Background:

Bridging the gap between expert scientific consensus and public belief is crucial.
The effectiveness of communicating scientific consensus on contested topics remains debated.
Understanding how consensus messaging impacts public perception and factual belief is essential.

Approach:

A preregistered meta-analysis synthesized data from 43 experiments.
The study focused on climate change, genetically modified food, and vaccination topics.
Effects on perceived scientific consensus and belief in scientific facts were assessed.

Key Points:

A single exposure to consensus messaging positively influenced perceived scientific consensus (g = 0.55).
Consensus communication also positively affected belief in scientific facts (g = 0.12).
Similar effects were observed for climate change and GMOs; vaccination data was limited.

Conclusions:

Communicating scientific consensus is an effective strategy for shifting public belief on contested science.
While effects are modest, consensus messaging can enhance understanding of scientific facts.
Further research is needed on vaccination topics due to limited experimental data.