Zanker, JohannesZeil, Jochen2015-12-132015-12-130954-898Xhttp://hdl.handle.net/1885/84687The movement of an observer generates a characteristic field of velocity vectors on the retina (Gibson 1950). Because such optic flow-fields are useful for navigation, many theoretical, psychophysical and physiological studies have addressed the questionKeywords: article; biological model; comparative study; environment; human; motion; movement (physiology); movement perception; orientation; perceptive discrimination; physiology; psychophysics; signal processing; visual system; Environment; Humans; Models, Neurolo Motion; Motion detector model; Motion integration; Natural scenes; Optic flow; Vision200510.1080/095489805004977582015-12-12