About the Authors

Dan B. Welch

dwelch@siue.edu

Affiliations Department of Growth, Development and Structure, Southern Illinois University – School of Dental Medicine, Alton, Illinois, United States of America, Department of Psychology, University of California Riverside, Riverside, California, United States of America

Aaron R. Seitz

Affiliation Department of Psychology, University of California Riverside, Riverside, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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