Summary: A large-scale analysis of more than 1.2 million social media posts linking to petitions finds that moral outrage fuels online virality but does not reliably produce petition signatures. While emotionally charged and moralizing messages attract likes and reposts, they often fail to convert attention into the concrete action of signing petitions. By contrast, messages that emphasize group identity, a sense of agency, and prosocial intent attract fewer likes but generate more signatures, revealing a growing gap between online attention and offline impact.
The study highlights the limits of social media as a mechanism for collective action: platforms readily amplify outrage, yet the kinds of appeals that spur measurable civic engagement—identity, solidarity, and helping others—receive less amplification despite being more effective at generating signatures.
Key findings
- Virality ≠ Action: Posts expressing moral outrage receive more likes and reposts but do not reliably increase petition signatures.
- Effective appeals for signatures: Content that emphasizes prosocial motives, group belonging, and individual agency leads to more petition signatures, even when such posts attract less online engagement.
- Digital disconnect: The data reveal a disconnect between social media attention and real-world collective action, raising questions about the value of viral outrage for long-term social change.
Source: SPSP
Study overview
Researchers led by Dr. Stefan Leach of Lancaster University examined 1,286,442 posts on X (formerly Twitter) that contained links to 24,785 petitions hosted on Change.org. Their aim was to identify which emotional and rhetorical appeals in social posts predicted both online engagement (likes and reposts) and real-world action measured by petition signatures.
The core result is a clear separation of effects: moral outrage strongly predicts social media virality but does not predict, and in some analyses is negatively associated with, petition signatures when accounting for virality. In contrast, appeals invoking agency, group identity, and the desire to help others predict higher signature counts but do not drive greater virality.
Dr. Leach explains that social platforms are structured to reward emotionally charged and moralized content because such posts capture attention. That mechanism can help raise awareness of injustices, yet awareness alone may be insufficient to produce the volunteer effort, persuasion, or sense of shared purpose necessary for offline collective action.
The research team’s mediation analyses indicate that outrage increases likes and reposts, and those metrics can indirectly relate to signatures via sheer exposure. However, when exposure is controlled for, outrage itself is linked to fewer signatures. In short, outrage spreads quickly, but it does not reliably translate into the follow-through that petition campaigns require.
Conversely, posts that frame issues in terms of helping others, belonging to a group, or believing one can make a difference tend to produce more signatures without drawing additional viral attention. These findings suggest that the rhetorical features that mobilize people to act are not the same as those that maximize shares and reactions.
As concerns about social media’s broader effects on political engagement, mental health, and public discourse grow, this study offers important empirical evidence about one concrete outcome: the relationship between online expression and civic participation. Dr. Leach urges caution in assuming that high engagement metrics equate to meaningful impact, arguing for a more nuanced view of how digital platforms shape collective behavior.
Future research will probe why moral outrage tends to decouple from collective action and which platform dynamics, message features, or audience behaviors might bridge the gap between attention and action. The authors emphasize the importance of understanding how online incentives shape which appeals rise to prominence and which succeed in motivating sustained, effortful civic participation.
About this psychology research news
Author: Stephen Waldron
Source: SPSP
Contact: Stephen Waldron – SPSP
Image: Image credited to Neuroscience News
Original research (open access):
“Moral Outrage Predicts the Virality of Petitions for Change on Social Media, But Not the Number of Signatures They Receive” by Stefan Leach et al. Published in Social Psychological and Personality Science. DOI: 10.1177/19485506251335373
Abstract
Moral Outrage Predicts the Virality of Petitions for Change on Social Media, But Not the Number of Signatures They Receive
Social media can rapidly broadcast activists’ messages, yet the viral spread of moral outrage may not translate into the sustained effort or coordinated behavior needed for social change. An analysis of 1,286,442 posts on X that linked to 24,785 Change.org petitions found that expressions of outrage uniquely predicted how often posts were liked and reposted. Mediation analysis showed that outrage related indirectly to signatures through increased virality, but when accounting for virality, outrage was associated with fewer petition signatures. In contrast, appeals emphasizing agency, collective identity, and prosocial motives were tied to higher numbers of signatures without increasing virality. These results map the distinct factors linked to online engagement versus petition-driven action and highlight how platform-driven amplification can prioritize attention-grabbing content that does not necessarily promote the effortful behaviors central to social change.