Adaptation decorrelates shape representations.
Springer Science and Business Media LLC
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Mattar, M. G., Olkkonen, M., Epstein, R. A., & Aguirre, G. K. (2018). Adaptation decorrelates shape representations.. Nat Commun, 9 (1), 3812. https://doi.org/10.1038/s41467-018-06278-y
Perception and neural responses are modulated by sensory history. Visual adaptation, an example of such an effect, has been hypothesized to improve stimulus discrimination by decorrelating responses across a set of neural units. While a central theoretical model, behavioral and neural evidence for this theory is limited and inconclusive. Here, we use a parametric 3D shape-space to test whether adaptation decorrelates shape representations in humans. In a behavioral experiment with 20 subjects, we find that adaptation to a shape class improves discrimination of subsequently presented stimuli with similar features. In a BOLD fMRI experiment with 10 subjects, we observe that adaptation to a shape class decorrelates the multivariate representations of subsequently presented stimuli with similar features in object-selective cortex. These results support the long-standing proposal that adaptation improves perceptual discrimination and decorrelates neural representations, offering insights into potential underlying mechanisms.
Humans, Magnetic Resonance Imaging, Form Perception, Adaptation, Physiological, Adolescent, Adult, Middle Aged, Female, Male, Young Adult, Discrimination, Psychological
External DOI: https://doi.org/10.1038/s41467-018-06278-y
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286790
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/