Pupil Dilation Reveals Early Solving in Mental Math
Get the Health newsletter
Daily health & science — research, biotech, public health, the studies worth knowing. Free.
- Université de Bordeaux researchers, together with UCLouvain, used eye‑tracking to monitor participants solving arithmetic problems.
- Pupil dilation increased as soon as participants began mental calculation, often before the final number was shown.
- Eye‑tracking data showed that the dilation preceded the presentation of the last digit, indicating early predictive processing.
- Study participants performed addition, subtraction, multiplication, and division tasks, demonstrating the effect across basic operations.
- Researchers interpret the dilation as a physiological marker of mental effort, offering a new window into real‑time cognitive processing.
Why it matters: Pupil dilation now provides a measurable cue for early arithmetic processing, aiding cognitive testing of students.
Ask SkimNews
