About the Authors

Cara E. Stepp

cstepp@alum.mit.edu

Affiliations Department of Speech, Language, and Hearing Sciences, Boston University, Boston, Massachusetts, United States of America, Department of Precision Engineering, The University of Tokyo, Tokyo, Japan

Qi An

Affiliation Department of Computer Science and Engineering, University of Washington, Seattle, Washington, United States of America

Yoky Matsuoka

Affiliation Department of Computer Science and Engineering, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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