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Statistical learning attenuates visual activity only for attended stimuli.

David Richter1, Floris P de Lange1

  • 1Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, Netherlands.

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Summary
This summary is machine-generated.

Sensory attenuation to predictable stimuli occurs only when attention is paid. When attention is diverted, neural responses to expected objects are no longer reduced, impacting predictive coding theories.

Keywords:
expectationhumanneuroscienceperceptionperceptual inferencepredictionvisual attention

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Area of Science:

  • Cognitive Neuroscience
  • Neuroscience
  • Visual Perception

Background:

  • Perception and behavior are influenced by predictions based on learned statistical regularities.
  • Neural responses to expected stimuli often show attenuation after statistical learning.
  • It remains unclear if this sensory attenuation is automatic or attention-dependent.

Purpose of the Study:

  • To investigate whether sensory attenuation following statistical learning is automatic or requires attention.
  • To examine the role of attention in modulating neural responses to predictable stimuli.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) study with human volunteers.
  • Participants were presented with sequentially ordered object stimuli where the first predicted the second.
  • Attention was manipulated by directing focus towards or away from the predictable objects.

Main Results:

  • A significant attenuation of neural activity was observed in the ventral visual stream for expected versus unexpected stimuli.
  • This sensory attenuation was contingent on attention; it disappeared when attention was directed away from the stimuli.
  • Neural attenuation of expected stimuli is not an automatic process but requires attentional engagement.

Conclusions:

  • Sensory attenuation in response to learned statistical regularities is attention-dependent.
  • These findings constrain neurocomputational models of perception, particularly those emphasizing probabilistic integration of prior knowledge and sensory input.
  • Attention plays a critical role in predictive processing within the visual system.