About the Authors
- Mariano Sigman, Stanislas Dehaene
- Unité INSERM 562, Cognitive Neuroimaging, Service Hospitalier Frédéric Joliot, CEA/DRM/DSV, Orsay cedex, France
The authors have declared that no competing interests exist.
MS and SD conceived and designed the experiments. MS performed the experiments and analyzed the data. MS and SD wrote the paper.