The spatiotemporal neural dynamics underlying perceived similarity for real-world objects
| Autor: | Jasper J. F. van den Bosch, Radoslaw Martin Cichy, Kamila M. Jozwik, Ian Charest, Nikolaus Kriegeskorte |
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| Přispěvatelé: | Jozwik, Kamila [0000-0002-0925-7780], Apollo - University of Cambridge Repository |
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Visual perception genetic structures Brain activity and meditation Cognitive Neuroscience media_common.quotation_subject Stimulus (physiology) Article 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Perception medicine Humans 0501 psychology and cognitive sciences Visual Cortex media_common Brain Mapping MEG Artificial neural network fMRI 05 social sciences Cognitive neuroscience of visual object recognition Object recognition Visual cortex medicine.anatomical_structure Pattern Recognition Visual Neurology Categorization Perceived similarity Female Psychology 030217 neurology & neurosurgery Cognitive psychology |
| Zdroj: | NeuroImage Neuroimage |
| ISSN: | 1053-8119 |
| DOI: | 10.1016/j.neuroimage.2019.03.031 |
| Popis: | The degree to which we perceive real-world objects as similar or dissimilar structures our perception and guides categorization behavior. Here, we investigated the neural representations enabling perceived similarity using behavioral judgments, fMRI and MEG. As different object dimensions co-occur and partly correlate, to understand the relationship between perceived similarity and brain activity it is necessary to assess the unique role of multiple object dimensions. We thus behaviorally assessed perceived object similarity in relation to shape, function, color and background. We then used representational similarity analyses to relate these behavioral judgments to brain activity. We observed a link between each object dimension and representations in visual cortex. These representations emerged rapidly within 200 ms of stimulus onset. Assessing the unique role of each object dimension revealed partly overlapping and distributed representations: while color-related representations distinctly preceded shape-related representations both in the processing hierarchy of the ventral visual pathway and in time, several dimensions were linked to high-level ventral visual cortex. Further analysis singled out the shape dimension as neither fully accounted for by supra-category membership, nor a deep neural network trained on object categorization. Together our results comprehensively characterize the relationship between perceived similarity of key object dimensions and neural activity. |
| Databáze: | OpenAIRE |
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