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2020-04-01

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/181522

Perceptual expectations modulate low-frequency activity: a statistical learning magnetoencephalography study

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Recurs relacionat

https://doi.org/10.1162/jocn_a_01511

Resum

Perceptual expectations can change how a visual stimulus is perceived. Recent studies have shown mixed results in terms of whether expectations modulate sensory representations. Here, we used a statistical learning paradigm to study the temporal characteristics of perceptual expectations. We presented participants with pairs of object images organized in a predictive manner and then recorded their brain activity with magnetoencephalography while they viewed expected and unexpected image pairs on the subsequent day. We observed stronger alpha-band (7-14 Hz) activity in response to unexpected compared with expected object images. Specifically, the alpha-band modulation occurred as early as the onset of the stimuli and was most pronounced in left occipito-temporal cortex. Given that the differential response to expected versus unexpected stimuli occurred in sensory regions early in time, our results suggest that expectations modulate perceptual decision-making by changing the sensory response elicited by the stimuli.

Matèries

Psicologia cognitiva, Percepció visual, Neurociència cognitiva

Matèries (anglès)

Cognitive psychology, Visual perception, Cognitive neuroscience

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Articles publicats en revistes (Cognició, Desenvolupament i Psicologia de l'Educació)
Publicacions de projectes de recerca finançats per la UE

Citació

ZHOU, Ying Joey, et al. Perceptual expectations modulate low-frequency activity: a statistical learning magnetoencephalography study. Journal of Cognitive Neuroscience. 2020. Vol. 32, num. 4, pags. 691-702. ISSN 0898-929X. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/181522

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