When a major new crisis breaks out—like a global pandemic or an economic collapse—what happens to our worries about other everyday risks? Historically, there have been two competing psychological theories answering this question. The first is the popular “finite pool of worry” hypothesis, which suggests that humans have a limited emotional capacity for anxiety; when a new, massive worry takes over, our concern for other unrelated hazards supposedly drops. The competing theory argues for a “positive cross-effect,” proposing that a surge in anxiety about one topic actually spills over, inflating our worries about entirely unrelated issues.
To definitively test these opposing ideas, a 2026 study published in Collabra: Psychology conducted a massive, high-powered web experiment on a representative sample of over 7,000 adults across the Czech Republic and Poland. Researchers intentionally manipulated participants’ anxiety levels by having them read biased, yet factually accurate, articles detailing one of three specific “target” social crises: the economic crisis, traffic accidents, or the COVID-19 pandemic. They then measured how this heightened state altered the participants’ self-reported worry regarding 12 completely unrelated “non-target” issues, ranging from corruption and crime to food poisoning and natural hazards.
The experiment provided strong evidence rejecting the “finite pool of worry” hypothesis. Instead, the researchers discovered a positive cross-effect: triggering worry about a target issue actually caused participants to become more worried about unrelated social hazards. While this overall trend was statistically robust, the general effect size across the pooled data was quite small or negligible. Interestingly, when looking at the individual countries, the cross-effects became more pronounced, particularly when participants were exposed to the economic and traffic accident crises. The only exception was the COVID-19 manipulation in the Czech Republic, which showed virtually no cross-effect, likely due to a low baseline of pandemic worry in that region at the time.
Beyond just proving that worry spills over, the study cracked open the psychological machinery driving this phenomenon, validating two distinct mechanisms. First, the spill-over is mediated by “generalized affect”, specifically, the negative valence (feeling worse overall) triggered by the target text. Heightened worry effectively colors our broader emotional state, making the entire world seem like a more dangerous place. Second, the cross-effect is moderated by “availability heuristics,” meaning the spill-over becomes even stronger when there is a perceived similarity or semantic overlap between the target and non-target risks, making related dangers easier to recall from memory.
While these findings open fascinating theoretical questions about how our brains process risk, they also carry important real-world implications. By demonstrating that heightened anxiety over one specific threat inflates our subjective vulnerability to other unrelated risks, the study highlights how easily public perception can become skewed. Although these distortions may be small on an individual level, the authors note that their true practical significance emerges when aggregated across entire populations. Ultimately, this research offers a grounded perspective on human psychology, proving that our fears don’t sit in isolated compartments; rather, when one wave of worry hits, it tends to lift all the other anxious boats.
The full paper is available online here.
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