Exploration of the Object-Based Warping Illusion: Distortions of Space Due to Objects and Grouping

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University of Delaware
Our perception of visual objects is amongst the most important aspects of our visual perception. While most illusions of space focus on depth or comparison cues, another class of object-based illusions elicit effects from their own innate properties. Whether or not these warping properties of illusions exist uniformly or separately between singular objects and strongly grouped objects is a topic of debate in visual perception literature. We further explore the object-based warping (OBW) illusion and the one-is-more (OIM) illusion in a set of two studies: the first of which studies the effects found in the OBW illusion on a continuum of objecthood, the second of which studies the combination of effects between the OBW and OIM illusions. The first study showed that grouped objects exhibit object warping effects, and these effects exist on a continuum directly correlated to objecthood strength. The second study showed that expansion effects increase uniformly with increasing objecthood, from two objects to one object. However, the second study provided contradicting results as well, where the compression effect increased uniformly from one object to two objects. This provides evidence for the potential distinction of processing between strongly grouped objects and singular objects.
Perception, Object-based warping, One-is-more illusion (OIM)