1997 volume 26(1) pages 17 – 27
doi:10.1068/p260017

Cite as:
Kaneko H, Uchikawa K, 1997, "Perceived angular and linear size: the role of binocular disparity and visual surround" Perception 26(1) 17 – 27
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Perceived angular and linear size: the role of binocular disparity and visual surround

Hirohiko Kaneko, Keiji Uchikawa

Received 7 August 1995, in revised form 4 November 1996

Abstract. An experiment was conducted to investigate the effects of perspective cue and binocular disparity on perceived angular and linear size. Following the 'angular' and 'linear' instructions, subjects matched the size of two squares, for which the binocular disparity between the centers of the squares and the configuration of the stimulus surrounding the squares were manipulated. Results showed that angular-size matches depended on the retinal-image size and the binocular disparity, and not on the visual-surround stimulus. Linear-size matches, on the other hand, depended on the visual-surround stimulus as well as on the image size and the binocular disparity. The visual-surround stimulus also affects the perceived depth between the test squares. These findings indicate that perceived angular and linear size depend on different processes that use different cues, and suggest that there is a causal relationship between perceived depth and perceived linear size.

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