Influence of a visual frame and vertical-horizontal illusion on shape and size perception.

Abstract

A variety of visual frames and of stimulus shapes are examined in a series of three experiments to investigate.the magnitude of the frame's effect on apparent size and apparent shape. Although a slight frame effect is demonstrated under very special conditions, its importance to the perceptual experience is questioned. The predominating effect of the vertical-horizontal phenomena is also explored.

Vertical-horizontal illusion: One eye is better than two

“…He found that the overestimation of the vertical line was enhanced when surrounded by a horizontally oriented frame, and that it was reduced-but not eliminated-by a vertically oriented frame. These results were replicated by Houck, Mefferd, and Greenstein (1972). However, none of these studies explicitly compared monocular and binocular viewing of differently oriented visual fields.…”

Exploring the Effects of Visual Frame and Matching Direction on the Vertical-Horizontal Illusion

“…In this second experiment, we used the same configurations and line extension task than in the first experiment but changed the rectangular artificial background frames by curvilinear frames. This time the expected frame effect is significant, which confirms results obtained in previous studies (Houck, Mefferd, & Greenstein, 1972;Ku¨nnapas, 1957bKu¨nnapas, , 1959 Figure 5. Degree of illusion and participants' dispersion in each visual frame when extending vertical or horizontal lines (collapsed configurations) in Experiment 2.…”

A Note on the Horizontal–Vertical Illusion – A Reply to Wade (2014)

“…Sleight and Austin (1952) could not in general replicate Fick's observations except for circles and ellipses. In turn, Houck, Mefferd, and Greenstein (1972) could not replicate Sleight and Austin but found some support for Fick's observations on rectangles and squares. Fick's (1851) explanation of the illusion in terms of astigmatism also instigated…”