Germeys F, De Graef P, Verfaillie K, 2000, "Transsaccadic representations of saccade-target and flanker objects: Location independence versus dependence" Perception 29 ECVP Abstract Supplement
Transsaccadic representations of saccade-target and flanker objects: Location independence versus dependence
F Germeys, P De Graef, K Verfaillie
To account for the integration of extrafoveal and foveal views across eye movements, two representational systems have been proposed. The first is a permanent lexicon of object detectors, which fire whenever evidence for particular objects is apprehended, regardless of their location in the visual field. The second is a set of temporary, episodic object files, each constructed for a specific object occupying a particular location in space.
Four experiments are reported in which transsaccadic preview benefits have been examined by (i) manipulating the spatiotemporal continuity of a to-be-identified object across a saccade, and (ii) the status of that object, ie saccade-target versus flanker object.
The results show substantial preview benefit (reduced gaze durations) for the saccade-target object, regardless of its spatiotemporal continuity (location independence). For the flanker object, preview benefit was dependent on the object's spatiotemporal continuity (location dependence). Results are interpreted in terms of a revised dual-code theory of transsaccadic object perception (Henderson, 1994 Journal of Experimental Psychology: General 123 410 - 426).
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