Journal
VISION RESEARCH
Volume 49, Issue 18, Pages 2297-2305Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.visres.2009.06.020
Keywords
Object recognition; fMRI; Adaptation; Lateral occipital complex; Gabor-jet model
Categories
Funding
- NSF [04-20794, 0531177, 06-17699]
- Direct For Social, Behav & Economic Scie
- Division Of Behavioral and Cognitive Sci [0531177] Funding Source: National Science Foundation
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A change in the basic-level class when viewing a sequence of two objects produces a large release from adaptation in LOC compared to when the images are identical. Is this due to a change in semantics or shape? In an fMRI-adaptation experiment, subjects viewed a sequence of two objects and judged whether the stimuli were identical in shape. Different-shaped stimuli could be from the same or different basic-level classes, where the physical similarities of the pairs in the two conditions were equated by a model of simple cell similarity. BOLD responses in LOC for the two conditions were equivalent, and higher than that of the identical condition, indicating that LOC is sensitive to shape rather than to basic-level semantics. (C) 2009 Elsevier Ltd. All rights reserved.
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