About the Authors

John Porrill

Affiliation Department of Psychology, Sheffield University, Sheffield, United Kingdom

Paul Dean

To whom correspondence should be addressed. E-mail: p.dean@sheffield.ac.uk

Affiliation Department of Psychology, Sheffield University, Sheffield, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JP and PD conceived and designed the experiments. JP performed the simulations. PD wrote the paper.