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Motion transparency : depth ordering and smooth pursuit eye movements

Schütz, Alexander C.


Originalveröffentlichung: (2011) Journal of Vision, 11(14), 21, 1-19 doi:10.1167/11.14.21
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URN: urn:nbn:de:hebis:26-opus-86711
URL: http://geb.uni-giessen.de/geb/volltexte/2012/8671/

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Freie Schlagwörter (Englisch): surface features , perceived depth order , smooth pursuit eye movement , motion transparency
Sammlung: Open Access - Publikationsfonds
Universität Justus-Liebig-Universität Gießen
Institut: Abteilung Allgemeine Psychology
Fachgebiet 1: Universität, Präsident der JLU
Fachgebiet 2: Psychologie
DDC-Sachgruppe: Psychologie
Dokumentart: Aufsatz
Sprache: Englisch
Erstellungsjahr: 2011
Publikationsdatum: 02.04.2012
Kurzfassung auf Englisch: When two overlapping, transparent surfaces move in different directions, there is ambiguity with respect to the depth ordering of the surfaces. Little is known about the surface features that are used to resolve this ambiguity. Here, we investigated the influence of different surface features on the perceived depth order and the direction of smooth pursuit eye movements. Surfaces containing more dots, moving opposite to an adapted direction, moving at a slower speed, or moving in the same direction as the eyes were more likely to be seen in the back. Smooth pursuit eye movements showed an initial preference for surfaces containing more dots, moving in a non-adapted direction, moving at a faster speed, and being composed of larger dots. After 300 to 500 ms, smooth pursuit eye movements adjusted to perception and followed the surface whose direction had to be indicated. The differences between perceived depth order and initial pursuit preferences and the slow adjustment of pursuit indicate that perceived depth order is not determined solely by the eye movements. The common effect of dot number and motion adaptation suggests that global motion strength can induce a bias to perceive the stronger motion in the back.
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