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Oliver Roth, Darko Odic, Jonathan Flombaum; The relationship between apparent motion and object files. Journal of Vision 2011;11(11):1286. doi: 10.1167/11.11.1286.
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© ARVO (1962-2015); The Authors (2016-present)
Object files (OFs) play an important role in theories of mid-level vision. On some influential views, OFs operate and persist only via spatiotemporal continuity. One open question concerns what occurs when direct spatiotemporal continuity is absent: do OFs move in accordance with any motion correspondence ultimately resolved? For example, do OFs accord with apparent motion (AM) correspondences, which lack continuous spatiotemporal stimulation. In Experiment 1, subjects were presented with an AM display consisting of two circles that, across two frames, were seen as moving between two noncontiguous locations. We drove specific correspondences along shorter distances, as is typical in AM. The two objects were primed with two symbols and were then moved in a single step; a third symbol appeared, and could either match the symbol from the closer or the further object. We found a robust object specific preview benefit (OSPB) for the shorter path, in other words, the path along which AM was perceived. In a second experiment this effect persisted even when motion along the shorter path included an impossible featural transformation (circles turning into squares), an OSPB that again accorded with typical AM. In order to control for the possibility that priming simply bleeds to any nearby object, in Experiment 3, the original two objects never disappeared, but two new objects appeared in the would-be AM locations. No AM was perceived, and no OSPB obtained. In Experiment 4, which was nearly identical to Experiment 3, no OSPB obtained despite unique featural matches between the initial and new objects, seemingly because no AM was perceived. Finally, we found that when four spatially separate items were present throughout, phi-motion produced an OSPB, supplying strong evidence that AM correspondences and OF correspondences are controlled by the same basic rules.
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