Summary: A large-scale analysis of brain imaging data shows that our brains can signal which messages are likely to spread widely. Across diverse campaigns and media, persuasive messages consistently engage neural systems tied to reward, empathy, and social cognition, reliably predicting both individual preferences and broader public appeal.
Notably, emotional brain responses were especially informative about which messages resonated with large audiences, even when those audiences did not undergo neuroimaging. These findings point to shared neural signatures that help explain how people collectively judge and share persuasive ideas — from public-health warnings to viral videos.
Key Facts
- Neural predictors: Brain systems involved in reward processing and social cognition consistently forecast message effectiveness across situations.
- Shared resonance: Emotional and mentalizing-related neural responses identified which messages appealed to broader audiences.
- Broad applicability: The same neural patterns emerged across advertising and public-health campaigns, movie trailers, crowdfunding pitches, and YouTube content.
Source: PNAS Nexus
Large pooled analysis of 572 participants finds that reward and social-processing brain activity predicts message impact.
Researchers Christin Scholz, Hang-Yee Chan, Emily Falk, and colleagues combined raw functional MRI data from 16 separate studies to investigate how the human brain responds to persuasive messages in different contexts. The pooled dataset encompassed participants exposed to public-health campaigns, crowdfunding appeals, movie trailers, and online videos, enabling a cross-context look at which neural responses align with persuasive success.
Across these varied settings, the analysis showed that effective messages reliably engaged neural regions associated with anticipating and experiencing reward as well as regions involved in understanding others’ thoughts and feelings — a process often termed mentalizing. In addition to these core signals, exploratory analyses highlighted the potential relevance of language processing, emotional reactivity, and sensorimotor responses for message impact.
Crucially, the same neural responses predicted both how individual participants evaluated messages during scanning and how the same messages performed at scale among large audiences who were not part of the neuroimaging samples. Emotional brain activity, in particular, was a strong predictor of message success when measured across broader populations, though those emotional signals were less predictive of preferences within the specific individuals who had been scanned.
These patterns suggest that some aspects of our neural responses operate as broadly shared indicators of persuasiveness. When a message triggers reward-related circuitry or prompts mentalizing — encouraging people to think about others — it is more likely to connect with audiences beyond the immediate sample. That universality helps explain why certain ads, public-health spots, or online clips gain traction while others do not.
According to the authors, these results deepen our understanding of the neurocognitive mechanisms that underlie effective messaging. By identifying neural signals that generalize across contexts, the study points toward practical ways to design communications that are more likely to resonate on a large scale and suggests that brain-based measures can provide information about message appeal that goes beyond self-reported reactions.
Key Questions Answered:
A: They found that activity in brain regions linked to reward and social understanding consistently predicts which messages will be effective across different audiences and media.
A: The team pooled fMRI data from 16 studies totaling 572 participants, examining responses to 739 messages and over 21,000 experimental trials spanning health campaigns, marketing materials, movie trailers, crowdfunding pitches, and online videos.
A: The findings indicate that certain neural signatures — especially those related to reward anticipation, empathy, and emotional engagement — may serve as reliable, general indicators of what makes a message resonate with large audiences, offering a scientific basis for improving message design.
About this neuroscience research news
Author: Emily Falk
Source: PNAS Nexus
Contact: Emily Falk – PNAS Nexus
Image: The image is credited to Neuroscience News
Original Research: Open access.
“Brain activity explains message effectiveness: A mega-analysis of 16 neuroimaging studies” by Christin Scholz et al. PNAS Nexus
Abstract
Brain activity explains message effectiveness: A mega-analysis of 16 neuroimaging studies
Persuasive communication — whether in marketing, politics, or public health — shapes purchase decisions, voting behavior, and population health. To better understand the neural bases of persuasive impact, the authors carried out a mega-analysis that pooled raw functional MRI datasets: 16 studies, 572 participants, 739 messages, and 21,688 experimental trials.
Building on theories that decision-making is motivated by expected rewards and by the perceived social relevance of outcomes, the study tested whether neural signals associated with reward anticipation, emotional engagement, and social cognition relate to message success both at the individual level and at scale.
The results support three main conclusions: (i) brain activity linked to reward and social processing is associated with message effectiveness across individuals and at population scale in diverse domains such as marketing and health communication; (ii) exploratory findings point to contributions from language, emotion, and sensorimotor processing; and (iii) neural measures add information about large-scale message impact beyond what participants’ self-reports reveal.
Overall, this work advances our understanding of the neurocognitive mechanisms that make messages persuasive, suggests a unified approach for studying communication across fields, and highlights possible targets for designing messages that are more likely to succeed with wide audiences.