Perceptual Organization of Apparent Motion in the Ternus Display

Perception - Tập 28 Số 7 - Trang 877-892 - 1999
Zijiang J. He1, Teng Leng Ooi2
1Department of Psychology, University of Louisville, Louisville, KY 40292, USA
2Department of Biomedical Sciences, Southern College of Optometry, 1245 Madison Avenue, Memphis, TN 38104, USA

Tóm tắt

A typical Ternus display has three sequentially presented frames, in which frame 1 consists of three motion tokens, frame 2 (blank) defines the interstimulus interval, and frame 3 has similar motion tokens with their relative positions shifted to the right. Interestingly, what appears to be a seemingly simple arrangement of stimuli can induce one of two distinct apparent-motion percepts in the observer. The first is an element-motion perception where the left-end token is seen to jump over its two neighboring tokens (inner tokens) to the right end of the display. The second is a group-motion perception where the entire display of the three tokens is seen to move to the right. How does the visual system choose between these two apparent-motion perceptions? It is hypothesized that the choice of motion perception is determined in part by the perceptual organization of the motion tokens. Specifically, a group-motion perception is experienced when a strong grouping tendency exists among the motion tokens belonging to the same frame. Conversely, an element-motion perception is experienced when a strong grouping tendency exists between the inner motion tokens in frames 1 and 3 (ie the two tokens that overlap in space between frames). We tested this hypothesis by varying the perceptual organization of the motion tokens. Both spatial (form similarity, 3-D proximity, common surface/common region, and occlusion) and temporal (motion priming) factors of perceptual organization were tested. We found that the apparent-motion percept of the Ternus display can be predictably affected, in a manner consistent with the perceptual organization hypothesis.

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Perception

Tập 28 Số 7

877-892

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