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. 2014 Mar 21;9(3):e90902. doi: 10.1371/journal.pone.0090902

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© 2014 Oberst et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Thin lines are one standard deviation away from the average (thick line); treatments: ‘Shaken’, (vs. illuminated as control) (); ‘Stones’ (); ‘Neighbours’ (); and ‘Darkness’ ().

Inline graphic — Thin lines are one standard deviation away from the average (thick line); treatments: ‘Shaken’, (vs. illuminated as control) (); ‘Stones’ (); ‘Neighbours’ (); and ‘Darkness’ ().