About the Authors
- James V. Stone
- Psychology Department, Sheffield University, Sheffield, United Kingdom
- Peter E. Jupp
- School of Mathematics and Statistics, University of St Andrews, St Andrews, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JS. Performed the experiments: JS. Analyzed the data: JS. Contributed reagents/materials/analysis tools: JS. Wrote the paper: JS PEJ. Mathematical proofs: PEJ.