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  Vertical object motion during horizontal ocular pursuit: compensation for eye movements increases with presentation duration

Souman, J., Hooge, I., & Wertheim, A. (2005). Vertical object motion during horizontal ocular pursuit: compensation for eye movements increases with presentation duration. Vision Research, 45(7), 845-853. doi:doi:10.1016/j.visres.2004.10.010.

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Souman, JL1, 2, Autor           
Hooge, ITC, Autor
Wertheim, AH, Autor
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              

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 Zusammenfassung: Smooth pursuit eye movements change the retinal image motion of objects in the visual field. To enable an observer to perceive the motion of these objects veridically, the visual system has to compensate for the effects of the eye movements. The occurrence of the Filehne-illusion (illusory motion of a stationary object during smooth pursuit) shows that this compensation is not always perfect. The amplitude of the illusion appears to decrease with increasing presentation durations of the stationary object. In this study we investigated whether presentation duration has the same effect when an observer views a vertically moving object during horizontal pursuit. In this case, the pursuit eye movements cause the perceived motion path to be oblique instead of vertical; this error in perceived motion direction should decrease with higher presentation durations. In Experiment 1, we found that the error in perceived motion direction indeed decreased with increasing presentation duration, especially for higher pursuit velocities. The results of Experiment 2 showed that the error in perceived motion direction did not depend on the moment during pursuit at which the stimulus was presented, suggesting that the degree of compensation for eye movements is constant throughout pursuit. The results suggest that longer presentation durations cause the eye movement signal that is used by the visual system to increase more than the retinal signal.

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 Datum: 2005
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: doi:10.1016/j.visres.2004.10.010
BibTex Citekey: 3523
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Titel: Vision Research
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 45 (7) Artikelnummer: - Start- / Endseite: 845 - 853 Identifikator: -