Title: The influence of categorisation on the perceived shape similarity of everyday objects
Authors: Gillebert, Céline ×
Op de Beeck, Hans
Wagemans, Johan #
Issue Date: 2008
Publisher: Société Belge de Psychologie
Series Title: Psychologica Belgica vol:48 issue:4 pages:261-282
Abstract: There is substantial evidence that object representations in adults are dynamically adapted by learning. Here we show that these effects are induced by active processing of objects in a particular task context, and not merely by visual exposure to objects during training. We derived behavioural sensitivity and neural selectivity for shape differences in a psychophysical and an event-related fMRI-adaptation study, respectively. We had two training conditions: “categorised objects” were categorised at a subordinate level based on fine shape differences, while “control objects” were seen equally often in a task context requiring no subordinate categorisation. After training,categorised objects were more easily discriminable than control objects and object-selective cortex was more selective for differences among categorised than control objects. These results indicate that the task context modulates the extent to which shape similarity is altered as a result of training, both at the behavioural and at the neural level.
ISSN: 0033-2879
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory for Cognitive Neurology
Laboratory for Experimental Psychology
Research Group Experimental Neurology
× corresponding author
# (joint) last author

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