Participants

Participants were as follows:

PhD students, postdocs and staff at the laboratory of experimental psychology at the Justus-Liebig Universität, Giessen, Germany, tested by Andrea van Doorn. Most observers were in their 20 s to 30 s. Total 21:10 males and 11 females.

PhD students, postdocs and staff at the laboratory of experimental psychology at the University of Leuven (KU Leuven), Leuven, Belgium. Most observers were in their 20 s to 30 s. Total 31:17 males and 14 females.

Observers of various ages tested during a workshop in Spain by Robert Pepperell. Variety of ages. Total 22:15 males and 7 females.

Students of various ages from the Cardiff School of Arts tested by Robert Pepperell. Variety of ages. Total 11:4 males and 7 females.

In total, there were 85 participants.

Distribution over genders was about equal (45% female). The 21 Giessen participants were aware that we were experimenting with a full optic array camera, the others did not. It made no difference to their result though.