About the Authors

Adam B. Barrett

abarrett@inf.ed.ac.uk

Affiliation Institute for Adaptive and Neural Computation, University of Edinburgh, Edinburgh, United Kingdom

M. C. W. van Rossum

Affiliation Institute for Adaptive and Neural Computation, University of Edinburgh, Edinburgh, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Wrote the paper: ABB MCWvR. Performed the research, using analytic mathematics, computer programming, and literature review: ABB. Conceived and designed the project: MCWvR. Performed computer simulations: MCWvR.