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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Sebastiaan Mathôt conceived and designed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Elle Van Heusden conceived and designed the experiments, performed the experiments, reviewed drafts of the paper.

Stefan Van der Stigchel conceived and designed the experiments, reviewed drafts of the paper.

Human Ethics

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

All participants signed informed consent before participating and received monetary compensation. The experiment was approved by the ethics committee of Utrecht University.

Data Deposition

The following information was supplied regarding data availability:

https://github.com/smathot/materials_for_P0014

Funding

The research leading to these results has received funding from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7/2007-2013) under REA grant agreement n° 622738 awarded to Sebastiaan Mathôt. In addition, this research was funded by a VIDI Grant 452-13-008 from the Netherlands Organization for Scientific Research to Stefan Van der Stigchel. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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