About the Authors
University of Barcelona, Faculty for Psychology, Basic Psychology Department, Barcelona, Spain
Research Institute for Brain, Cognition, and Behavior (IR3C), Campus Mundet, Barcelona, Spain
The authors have declared that no competing interests exist.
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.