About the Authors

Samuel A. Mehr

smehr@wjh.harvard.edu

Affiliations Department of Psychology, Harvard University, Cambridge, Massachusetts, United States of America, Harvard Graduate School of Education, Cambridge, Massachusetts, United States of America

Adena Schachner

Current address: Department of Psychology, Boston University, Boston, Massachusetts, United States of America

Affiliation Department of Psychology, Harvard University, Cambridge, Massachusetts, United States of America

Rachel C. Katz

Current address: Eliot-Pearson Department of Child Development, Tufts University, Medford, Massachusetts, United States of America

Affiliation Department of Psychology, Harvard University, Cambridge, Massachusetts, United States of America

Elizabeth S. Spelke

Affiliation Department of Psychology, Harvard University, Cambridge, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SAM AS RCK ESS. Performed the experiments: SAM AS RCK. Analyzed the data: SAM AS. Contributed reagents/materials/analysis tools: SAM AS RCK ESS. Wrote the paper: SAM AS ESS.