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Additional Information

Competing Interests

The author declares he has no competing interests.

Author Contributions

Michael J Proulx conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper.

Human Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

Ethical approval was obtained from the JHU IRB, QMREC and Bath Psychology Ethics Committee, and all participants gave informed, written consent.


This study was supported in part by the National Science Foundation (GRF). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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