<p>Three-dimensional stimuli consisted of a fork intersecting an plate either in the far space or in the near space both in ‘match’ (visual angles of stimuli were matched in the near and far spaces) stimuli (A) and ‘natural’ (visual angles of stimuli were same in the near and far spaces) stimuli (B). (Reprinted from [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0151838#pone.0151838.ref019" target="_blank">19</a>] under a CC BY license, with permission from [Massachusetts Institute of Technology], original copyright [2012].).</p
