Structural similarity and category-specificity: a refined account

Neuropsychologia
Christian GerlachO B Paulson

Abstract

It has been suggested that category-specific recognition disorders for natural objects may reflect that natural objects are more structurally (visually) similar than artefacts and therefore more difficult to recognize following brain damage. On this account one might expect a positive relationship between blood flow and structural similarity in areas involved in visual object recognition. Contrary to this expectation we report a negative relationship in that identification of articles of clothing cause more extensive activation than identification of vegetables/fruit and animals even though items from the categories of animals and vegetables/fruit are rated as more structurally similar than items from the category of articles of clothing. Given that this pattern cannot be explained in terms of a tradeoff between activation and accuracy, we interpret these findings within a model where the matching of visual forms to memory incorporates two operations: (i) the integration of stored object features into whole object representations (integral units), and (ii) the competition between activated integral units for selection (i.e. identification). In addition, we suggest that these operations are differentially affected by structural ...Continue Reading

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Citations

Apr 16, 2009·Cerebral Cortex·Randi StarrfeltAlexander P Leff
Feb 7, 2007·Journal of Cognitive Neuroscience·Christian Gerlach
Aug 30, 2006·Brain and Cognition·Keith R Laws, Maria Z Hunter
Aug 7, 2009·Cognitive Neuropsychology·Sally J Robinson, Christine M Temple
May 10, 2017·Nature Human Behaviour·Lang ChenTimothy T Rogers
Dec 15, 2017·Visual Cognition·Sven PanisGlyn W Humphreys

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