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Spatial attention, precision, and Bayesian inference: a study of saccadic response speed

Vossel, S.
•
Daunizeau, J.
•
Bauer, M.
altro
Mathys, Christoph Daniel
2014
  • journal article

Periodico
CEREBRAL CORTEX
Abstract
Inferring the environment's statistical structure and adapting behavior accordingly is a fundamental modus operandi of the brain. A simple form of this faculty based on spatial attentional orienting can be studied with Posner's location-cueing paradigm in which a cue indicates the target location with a known probability. The present study focuses on a more complex version of this task, where probabilistic context (percentage of cue validity) changes unpredictably over time, thereby creating a volatile environment. Saccadic response speed (RS) was recorded in 15 subjects and used to estimate subject-specific parameters of a Bayesian learning scheme modeling the subjects' trial-by-trial updates of beliefs. Different response models-specifying how computational states translate into observable behavior-were compared using Bayesian model selection. Saccadic RS was most plausibly explained as a function of the precision of the belief about the causes of sensory input. This finding is in accordance with current Bayesian theories of brain function, and specifically with the proposal that spatial attention is mediated by a precision-dependent gain modulation of sensory input. Our results provide empirical support for precision-dependent changes in beliefs about saccade target locations and motivate future neuroimaging and neuropharmacological studies of how Bayesian inference may determine spatial attention. © The Author 2013. Published by Oxford University Press
DOI
10.1093/cercor/bhs418
WOS
WOS:000336529700003
Archivio
http://hdl.handle.net/20.500.11767/47854
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84900819344
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4014178/
Diritti
open access
Soggetti
  • cue validity

  • hierarchical model

  • variational Baye

  • visuospatial processi...

  • volatility

  • Adult

  • Algorithm

  • Cue

  • Eye Movement Measurem...

  • Female

  • Fixation, Ocular

  • Human

  • Male

  • Neuropsychological Te...

  • Probability

  • Reaction Time

  • Reproducibility of Re...

  • Task Performance and ...

  • Young Adult

  • Attention

  • Bayes Theorem

  • Learning

  • Models, Psychological...

  • Saccade

  • Space Perception

  • Settore M-PSI/02 - Ps...

Scopus© citazioni
96
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
97
Data di acquisizione
Mar 6, 2024
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