About the Authors

Jamie D Roitman

To whom correspondence should be addressed. E-mail: jroitman@uic.edu

¤ Current address: Department of Psychology, University of Illinois at Chicago, Chicago, Illinois, United States of America

Affiliation Department of Neurobiology, Duke University, Durham, North Carolina, United States of America

Elizabeth M Brannon

Affiliations Department of Psychology and Neuroscience, Duke University, Durham, North Carolina, United States of America , Center for Cognitive Neuroscience, Duke University, Durham, North Carolina, United States of America

Michael L Platt

Affiliations Department of Neurobiology, Duke University, Durham, North Carolina, United States of America , Center for Cognitive Neuroscience, Duke University, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

All authors conceived and designed the experiments and wrote the paper. JDR performed the experiments and analyzed the data. EMB and MLP contributed reagents/materials/analysis tools.