Francis G, Kim H, 1999, "Motion parallel to line orientation: Disambiguaton of motion percepts" Perception 28(10) 1243 – 1255
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Motion parallel to line orientation: Disambiguaton of motion percepts
Gregory Francis, Hyungjun Kim
Received 12 November 1998, in revised form 19 June 1999
Abstract. Four experiments demonstrate that lines indicating path of movement can generate rotational percepts in a multistable motion display that usually produces only horizontal or vertical motion percepts. The properties of the path-of-movement lines are predicted by a neural-network theory of visual perception. Experimental results validate the theory's predictions by demonstrating that movement of the display elements seems to follow an increasing luminance gradient in lines but not bars, and that illusory contours have similar effects. Experimental results also demonstrate that, in a choice between movement along lines drawn parallel or orthogonal to possible motion paths, observers more often see movement along the lines parallel to the motion path. These results suggest modifications to current computational and neurophysiological theories of motion perception.
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