About the Authors

Matthias S. Keil, Joan López-Moliner
University of Barcelona, Faculty for Psychology, Basic Psychology Department, Barcelona, Spain

Matthias S. Keil, Joan López-Moliner
Research Institute for Brain, Cognition, and Behavior (IR3C), Campus Mundet, Barcelona, Spain

Corresponding Author

matskeil@ub.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MSK JLM. Performed the experiments: MSK JLM. Analyzed the data: MSK. Contributed reagents/materials/analysis tools: MSK. Wrote the paper: MSK. Designed and performed the psychophysical experiment: JLM. Developed the model and performed mathematical analysis: MSK.