Humans do not have direct access to retinal flow during walking

Souman JL, Freeman TCA, Eikmeier V, Ernst MO (2010)
Journal of Vision 10(11): 14.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Souman, Jan L.; Freeman, Tom C. A.; Eikmeier, Verena; Ernst, Marc O.UniBi
Abstract / Bemerkung
Perceived visual speed has been reported to be reduced during walking. This reduction has been attributed to a partial subtraction of walking speed from visual speed (F. H. Durgin & K. Gigone, 2007; F. H. Durgin, K. Gigone, & R. Scott, 2005). We tested whether observers still have access to the retinal flow before subtraction takes place. Observers performed a 2IFC visual speed discrimination task while walking on a treadmill. In one condition, walking speed was identical in the two intervals, while in a second condition walking speed differed between intervals. If observers have access to the retinal flow before subtraction, any changes in walking speed across intervals should not affect their ability to discriminate retinal flow speed. Contrary to this "direct access hypothesis," we found that observers were worse at discrimination when walking speed differed between intervals. The results therefore suggest that observers do not have access to retinal flow before subtraction. We also found that the amount of subtraction depended on the visual speed presented, suggesting that the interaction between the processing of visual input and of self-motion is more complex than previously proposed.
walking; frame of; retinal flow; visual motion perception; locomotion; reference; self-motion
Journal of Vision
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Souman JL, Freeman TCA, Eikmeier V, Ernst MO. Humans do not have direct access to retinal flow during walking. Journal of Vision. 2010;10(11):14.
Souman, J. L., Freeman, T. C. A., Eikmeier, V., & Ernst, M. O. (2010). Humans do not have direct access to retinal flow during walking. Journal of Vision, 10(11), 14.
Souman, Jan L., Freeman, Tom C. A., Eikmeier, Verena, and Ernst, Marc O. 2010. “Humans do not have direct access to retinal flow during walking”. Journal of Vision 10 (11): 14.
Souman, J. L., Freeman, T. C. A., Eikmeier, V., and Ernst, M. O. (2010). Humans do not have direct access to retinal flow during walking. Journal of Vision 10, 14.
Souman, J.L., et al., 2010. Humans do not have direct access to retinal flow during walking. Journal of Vision, 10(11), p 14.
J.L. Souman, et al., “Humans do not have direct access to retinal flow during walking”, Journal of Vision, vol. 10, 2010, pp. 14.
Souman, J.L., Freeman, T.C.A., Eikmeier, V., Ernst, M.O.: Humans do not have direct access to retinal flow during walking. Journal of Vision. 10, 14 (2010).
Souman, Jan L., Freeman, Tom C. A., Eikmeier, Verena, and Ernst, Marc O. “Humans do not have direct access to retinal flow during walking”. Journal of Vision 10.11 (2010): 14.

5 Zitationen in Europe PMC

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