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Ballaz, Cecile; Boutsen, Luc; Peyrin, Carole; Humphreys, Glyn W.; Marendaz, Christian – Journal of Experimental Psychology: Human Perception and Performance, 2005
The authors studied the influence of canonical orientation on visual search for object orientation. Displays consisted of pictures of animals whose axis of elongation was either vertical or tilted in their canonical orientation. Target orientation could be either congruent or incongruent with the object's canonical orientation. In Experiment 1,…
Descriptors: Psychological Studies, Visual Perception, Visual Stimuli, Cognitive Processes
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Olivers, Christian N. L.; Humphreys, Glyn W. – Journal of Experimental Psychology: Human Perception and Performance, 2004
The mechanisms underlying segmentation and selection of visual stimuli over time were investigated in patients with posterior parietal damage. In a modified visual search task, a preview of old objects preceded search of a new set for a target while the old items remained. In Experiment 1, control participants ignored old and prioritized new…
Descriptors: Cues, Visual Stimuli, Cognitive Processes, Visual Discrimination