Abstract:
:With respect to what frames of reference, or spatial coordinate systems, is attention allocated to locations in space? We posed this question about the spatial attention system that has been damaged in neglect patients, distinguishing among three possible types of spatial reference frame: viewer-centered, according to which locations are coded with respect to the viewer, environment-centered, according to which locations or coded with respect to the environment, and object-centered, according to which locations are coded with respect to an object. The three candidate frames of reference were decoupled from one another by rotating either the viewer or the stimulus object. Visual search performance suggested that the neglected hemifield was defined with respect to both viewer-centered and environment-centered frames of reference, but not with respect to an object-centered frame of reference. The role of objects in the allocation of attention to space, and the relation between our findings and the "two cortical visual systems" hypothesis, are discussed.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Farah MJ,Brunn JL,Wong AB,Wallace MA,Carpenter PAdoi
10.1016/0028-3932(90)90060-2subject
Has Abstractpub_date
1990-01-01 00:00:00pages
335-47issue
4eissn
0028-3932issn
1873-3514pii
0028-3932(90)90060-2journal_volume
28pub_type
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