Skip to main content
. 2014 Aug 20;9(8):e104886. doi: 10.1371/journal.pone.0104886

Figure 1. Experimental Set-up.

Figure 1

A/B. Stimulus' pupils changed dynamically in size after 600 ms of static presentation. The maximum or minimum was reached after 1000 ms. C. The testing situation was the same for human and chimpanzee subjects. D. Schematic representation of pupil-size mimicry.