1975 volume 4(3) pages 251 – 254
doi:10.1068/p040251

Cite as:
Coren S, Girgus J S, 1975, "A size illusion based upon a minimal interposition cue" Perception 4(3) 251 – 254
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A size illusion based upon a minimal interposition cue

Stanley Coren, Joan S Girgus

Received 13 May 1975

Abstract. It has often been suggested that many visual geometric illusions are caused by inappropriate constancy scaling triggered by depth cues implicit in the two-dimensional array. A new size illusion based upon a minimal interposition cue is presented, which seems to support this contention. Asymmetries in the results suggest that the major component of the illusion is overestimation of apparently more distant targets rather than underestimation of apparently closer targets.

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