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Title: Visual attention and awareness : lessons from the damaged and intact brain
Author: Ritchie, Kay Laird
ISNI:       0000 0004 2737 407X
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2012
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The studies presented in this thesis address current issues in visual attention and awareness research. The first three experimental chapters investigate saccadic remapping of location and orientation information, with a particular focus on saccadic remapping in hemianopia. The results suggest that residual visual abilities in the blind field are necessary in order for a stimulus to be remapped from the blind to the sighted visual field. The results also suggest that remapping underpins our ability to maintain attention at specific spatiotopic locations across a series of saccades. Further evidence from both hemianopic and neurologically intact participants suggest that some orientation information is remapped across saccades. The second three experimental chapters investigate binocular rivalry in previously unstudied paradigms. The results show that the established face dominance and emotion dominance effects in binocular rivalry persist when the stimuli are viewed in peripheral vision. The results also suggest that a stable image presented in the opposite hemifield from the rival pair does not affect the perceived dominance of the separate images within the rival pair, but that the percepts in the rival pair tend to synchronise with those of a second rival pair presented in the opposite hemifield. Using Diaz-Caneja stimuli (half of each image presented to each eye) the results of the final experiments suggest a combination of eye- and object-dominance mechanisms in binocular rivalry in both the intact and the split-brain.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Visual perception ; Attention ; Visual pathways