Towards a unified model of vision and attention: Effects of visual landmarks and identity cues on covert and overt attention movements.

Show simple item record Lambert, Anthony en Wilkie, J en Greenwood, A en Ryckman, N en Sciberras-Lim, Evatte Tiana en Booker, L-J en Tahara-Eckl, Lenore en 2018-10-12T01:33:08Z en 2017 en
dc.identifier.issn 0096-1523 en
dc.identifier.uri en
dc.description.abstract To what extent are shifts of attention driven by encoding of visual-spatial landmarks, associated with useful locations, or by encoding of environmental cues that act as symbolic representations, providing information about where to look next? In Experiment 1 we found that when cues were presented with a long exposure time (300ms) attention shifts were driven by the symbolic identity of cue stimuli, independently of their visual-spatial (landmark) features; but when cues were exposed very briefly, (66ms), attention shifts were independent of symbolic information, and were driven instead by visual landmark features. This unexpected finding was interpreted in terms of the transient and sustained response characteristics of the M-cell and P-cell inputs to the dorsal and ventral visual streams, respectively, and informed our theoretical proposal that attentional effects elicited by visual-spatial landmarks may be driven by dorsal stream (‘where pathway’) encoding; while attentional effects driven by the symbolic identity of cues may be driven by ventral stream (‘what pathway’) encoding. Detailed predictions derived from this proposal, and based on distinct physiological properties of the two visual streams were tested and confirmed in Experiments 2-6. Our results suggest that a two-process view of attention shifting can be integrated with dual-stream models of vision. According to this unified theory: (1) Landmarks associated with visually useful locations elicit rapid, non-conscious shifts of attention, via non-semantic, dorsal visual stream encoding of their features and spatial relationships; (2) Slower, endogenous shifts of attention are elicited by ventral visual stream encoding of symbolic-semantic information. en
dc.publisher American Psychological Association en
dc.relation.ispartofseries Journal of Experimental Psychology: Human Perception and Performance en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
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dc.rights.uri en
dc.subject attention en
dc.subject vision en
dc.subject consciousness en
dc.subject awareness en
dc.subject dorsal visual stream en
dc.subject ventral visual stream en
dc.subject visual orienting en
dc.subject visual perception en
dc.subject eye movements en
dc.subject spatial cueing en
dc.title Towards a unified model of vision and attention: Effects of visual landmarks and identity cues on covert and overt attention movements. en
dc.type Journal Article en
dc.identifier.doi 10.1037/xhp0000474 en
dc.rights.holder Copyright: American Psychological Association en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 644481 en Science en Psychology en
pubs.record-created-at-source-date 2017-08-04 en

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