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Supplemental Information

Supplemental Information 1

DOI: 10.7287/peerj.preprints.269v1/supp-1

Additional Information

Competing Interests

The authors have no competing interests.

Author Contributions

Åse Rognmo Mikalsen conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Ivar Folstad conceived and designed the experiments, wrote the paper, reviewed drafts of the paper, initiated the study and supervised Åse during her master studies.

Nigel G Yoccoz conceived and designed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper.

Bruno Laeng conceived and designed the experiments, performed the experiments, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper.

Human Ethics

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

We studied facial pictures from students that had approved such use at the Department of Psychology, University of Tromsø, Norway. The manuscript include pictures of one student, as an example of the pictures used. The student on these pictures have approved publication of the pictures.

Funding

The study was funded by the University of Tromsø. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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