From what to where: neuropsychological evidence for implicit interactions between object- and space- based attention.
Three experiments examined nonspatial extinction in G.K., a patient with bilateral parietal damage. Experiment 1 demonstrated nonspatial extinction (poor detection of a weak relative to a stronger perceptual group), even when the stronger group was less complex than the weaker group. Experiment 2 showed improved report of a letter falling at the location of the stronger group, but explicit judgments of the location of the letter were at chance. Experiment 3 replicated the object-cuing benefit, though G.K. could not discriminate whether a letter fell at the same location as the stronger perceptual group. The data indicate coupling between object- and space-based attention, so that spatial attention is drawn to the location occupied by the winner of object-based competition for selection. In this case, what cues where. This coupling operates implicitly, even when explicit location judgments are impaired.
Humphreys
Glyn W
GW
Behavioural Brain Sciences Centre, School of Psychology, University of Birmingham, Birmingham, United Kingdom. g.w.humphreys@bham.ac.uk
Jane Riddoch
M
M
D000377:Agnosia / Q000503:physiopathology / Q000523:psychology; D001288:Attention / Q000502:physiology*; D001925:Brain Damage, Chronic / Q000503:physiopathology / Q000523:psychology; D002544:Cerebral Infarction / Q000503:physiopathology* / Q000523:psychology; D003463:Cues; D004292:Dominance, Cerebral / Q000502:physiology*; D005108:Extinction, Psychological / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D009778:Occipital Lobe / Q000503:physiopathology; D009949:Orientation / Q000502:physiology*; D010296:Parietal Lobe / Q000503:physiopathology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D013577:Syndrome; D013702:Temporal Lobe / Q000503:physiopathology