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. Author manuscript; available in PMC: 2012 Jan 19.
Published in final edited form as: J Vis. 2011 Jan 19;11(1):16. doi: 10.1167/11.1.16

Figure 2.

Figure 2

Experiment 1 (ellipses aligned, ellipse-to-mask SOA = 40 ms). (A) The aspect-ratio-repulsion index (see main text) for the perception of circles, flat ellipses, and tall ellipses (with data averaged across the between- and within-hemifield conditions); positive values indicate repulsive effects and negative values indicate averaging effects. * Represents p < 0.05. (B) Ratings of ellipses with different aspect ratios (including circle) when paired with ellipses with identical aspect ratios and presented in a vertical global organization (open symbols) or a horizontal global organization (filled symbols). The x-axis indicates the rated ellipses and the y-axis indicates the observer's ratings of those ellipses. The dashed gray line represents the expected aspect-ratio ratings if perception was veridical. Ellipses in pairs that formed global vertical organizations were perceived to be taller than ellipses in pairs that formed global horizontal organizations, but global organization only affected the perception of tall ellipses. For both (A) and (B), the error bars represent ±1 SEM (adjusted for repeated-measures comparisons in (B)).