Study finds heart rate drops during visual mistakes
Mar 4th 2026
Researchers report that the heart briefly slows when people make visual perception errors, supporting the idea that conscious experience reflects ongoing brain body interactions.
- Study published in Biological Psychology tracked ECG and eye movements in 24 to 26 participants during a visual color-shape task.
- The experiment was tuned so participants were correct about 70 percent of the time and made perceptual errors about 30 percent of the time.
- Heart rate slowed during the task and decelerated more when participants experienced perceptual illusions than when they identified the target correctly.
- A brief loud alerting tone made responses faster but did not improve accuracy.
- Participants who did not notice an unexpected visual change showed larger heart rate drops during errors than those who noticed it.
- Authors say the effects are small and correlational and do not prove the heart controls perception, but suggest body signals contribute to conscious perception.