About the Authors

Matteo Valsecchi, Karl R. Gegenfurtner
Abteilung Allgemeine Psychologie, Justus-Liebig-Universität, Giessen, Germany

Corresponding Author

matteo.valsecchi@gmail.com

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MV KRG. Performed the experiments: MV. Analyzed the data: MV. Contributed reagents/materials/analysis tools: MV KRG. Wrote the paper: MV KRG.