About the Authors

Karel Kleisner, Lenka Priplatova, Jaroslav Flegr
Department of Philosophy and History of Science, Charles University in Prague, Prague, Czech Republic

Peter Frost
Department of Anthropology, Université Laval, Quebec City, Canada

Corresponding Author

kleisner@seznam.cz

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KK JF. Performed the experiments: KK LP. Analyzed the data: KK. Wrote the paper: KK PF JF.