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Scientists Find a Hidden Bias in How Brains Process Deaths Closer To Home
In A Nutshell
- Brain activity actually dropped as the number of people at risk in the home country grew larger, rather than rising with the stakes
- For victims abroad, brain responses rose for moderate group sizes but fell again for both very small and very large numbers
- Learning that someone died produced a stronger brain response than learning they survived, but only for home-country victims
- In a related money task, participants gave more overall to domestic causes and far less per person as group sizes increased
For decades, humanitarian workers and psychologists have wondered why global disasters often fail to attract funding and political attention proportional to their scale. New research from the University of Sussex, published in the journal Social Cognitive and Affective Neuroscience, offers a clue buried in the brain itself. As tragedies grow larger, brain activity in several key regions actually seems to fade rather than spike, at least among the small group of people studied.
That is not a judgment about anyone’s character. It is a pattern that turned up in a small brain-imaging study, one the researchers themselves call preliminary and in need of a bigger, more varied follow-up.
What makes this study stand out is the pairing of brain scans with a separate money task, asking people how they would divide a hypothetical budget between saving lives at home and abroad. The same bias turned up there: participants gave more overall to UK projects, and the amount per person fell sharply as the number of people needing help grew. Together, the two results sketch a gap between the values people say they hold and how their brains seem to actually respond to suffering.
Twenty-Five Brains, Hundreds of Headlines About Life and Death
Twenty-five participants, nearly all British, lay inside a brain scanner reading brief, standardized headlines adapted from real news stories, describing people at risk of dying. Some headlines described crises at home in the United Kingdom. Others involved people in one of 56 foreign countries, with numbers ranging from a single person to tens of thousands. After each headline, participants learned whether the people survived or died. As a comparison, they also read headlines about financial losses of varying sizes, giving researchers a way to see how the brain handles scale when emotion isn’t involved.
Outside the scanner, participants imagined themselves as a UK government minister deciding how to split a budget between stopping flood deaths at home and abroad. Researchers tracked brain activity using fMRI, a scan that measures blood flow as a stand-in for neural activity.
Money and Lives Triggered Very Different Brain Patterns
Money followed the pattern researchers expected: brain activity in several regions climbed as the number of credits at risk grew. Bigger stakes, bigger response.
For lives at risk in the home country, the pattern flipped entirely. No brain regions became more active as the number of people in danger increased. Instead, widespread regions showed declining activity as the number grew, a pattern researchers describe as consistent with a ‘collapse of compassion,’ in which engagement falls as numbers climb rather than fading gradually.
For lives at risk abroad, researchers observed an inverted-U pattern, which they then tested in an additional post hoc analysis: low for a single person in a foreign country, somewhat higher for moderate numbers, then low again for the largest groups. A single foreign life at risk produced a weaker brain response than a single life at risk at home. Researchers suggest this gap may partly reflect the fact that single-victim stories from other countries appear less often in media coverage, though the authors describe this as a plausible explanation rather than a confirmed one.
One region that included the right temporoparietal junction, an area linked to perspective-taking and imagining other people’s experiences, showed declining responses to large numbers of victims regardless of whether they were at home or abroad. A common underlying limit may be at work: the brain struggles to mentally picture very large numbers of individuals, whether the crisis is domestic or foreign.
Foreign Deaths Barely Moved Brain Activity
Perhaps the most notable finding involved how the brain responded to learning that people had actually died. In brain regions previously linked to emotional responses to harm affecting other people, including areas at the front of the brain and the insula, a region deep inside the brain tied to feelings and awareness, death produced a stronger response than survival, but only for home-country victims. For foreign victims, those same regions showed no meaningful difference between learning someone survived and learning someone died.
In follow-up ratings, participants judged the chance that an event could affect them or someone they knew as a more likely explanation for the home-country bias than shared identity with UK victims.
This study puts a number on something people already suspected: the brain doesn’t treat one life and ten thousand lives the same way, and it doesn’t treat a stranger next door the same as a stranger overseas. The sample was small, just 25 people, and skewed toward politically left-leaning, non-isolationist views. The authors suspect the home-country bias they measured may actually be a conservative estimate; in a more nationalist or isolationist sample, the gap could run wider still.
None of this proves what drives real donations or government budgets. But it offers a plausible piece of the puzzle for why massive, distant tragedies keep struggling to compete for attention with smaller, closer ones.
Disclaimer: This article describes findings from a single peer-reviewed study with a small sample size. The patterns reported reflect group-level brain activity in a laboratory setting and should not be read as a definitive account of how any individual processes news of tragedy or death.
Paper Notes
Limitations
Sample size, the authors say, was appropriate for detecting main fMRI effects, but too small to reliably test differences between individuals. Behavioral findings should be treated cautiously until replicated in larger samples. The participant group was predominantly politically left-leaning and non-isolationist, meaning the home-country bias observed here may underestimate how strong such effects are in other populations. Lab conditions also differ from real-world settings, including the possibility that participants behaved differently knowing they were being observed. For the money allocation task, the researchers note that replications offering real, uncapped budgets would strengthen confidence in the results.
Funding and Disclosures
This work was supported by the University of Sussex School of Psychology funding to Daniel Campbell-Meiklejohn and an Economic and Social Research Council studentship (grant number ES/J500173/1) to Jo Cutler. Scanning support came from the Clinical Imaging Sciences Centre at Brighton and Sussex Medical School. The authors report no conflicts of interest.
Publication Details
Authors: Daniel Campbell-Meiklejohn and Jo Cutler, both affiliated with the School of Psychology and Sussex Neuroscience at the University of Sussex. Jo Cutler also holds affiliations with the Centre for Human Brain Health, Institute for Mental Health, and Centre for Developmental Science at the University of Birmingham. | Journal: Social Cognitive and Affective Neuroscience, Volume 21, Issue 1 (2026) | Paper Title: ‘Diminished neural responses for greater numbers of lives at risk and lives lost in foreign countries’ | DOI: https://doi.org/10.1093/scan/nsag049 | Publication Date: Advance Access published July 8, 2026. All data were collected in 2019.







