About the Authors

Karl Friston
The Wellcome Trust Centre of Neuroimaging, University College London, London, United Kingdom

Corresponding Author

k.friston@fil.ion.ucl.ac.uk

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KJF. Performed the experiments: KJF. Analyzed the data: KJF. Contributed reagents/materials/analysis tools: KJF. Wrote the paper: KJF.