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Related Experiment Video

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Cross-Modal Multivariate Pattern Analysis

Cross-Modal Multivariate Pattern Analysis

Published on: November 9, 2011

Serial Dependence in Perceptual Decisions Is Reflected in Activity Patterns in Primary Visual Cortex.

Elexa St John-Saaltink¹, Peter Kok¹, Hakwan C Lau²

¹Radboud University, Donders Institute for Brain, Cognition and Behaviour, 6525 EN Nijmegen, The Netherlands, and.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|June 10, 2016

Summary

Previous visual stimuli bias current perception, a phenomenon known as serial dependence. This study reveals that neural activity in early visual cortex (V1) also shows this bias, suggesting perceptual history shapes sensory processing.

Keywords:

MVPA fMRI perceptual bias primary visual cortex priming trial history

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Area of Science:

Neuroscience
Cognitive Science
Visual Perception

Background:

The brain uses regularities in sensory input, like world stability, to form expectations.
Serial dependence is a perceptual bias where recent stimuli influence current perception, making new stimuli seem similar to previous ones.

Purpose of the Study:

To investigate the neural basis of serial dependence in visual perception.
To determine if serial dependence originates in early sensory areas or higher-level decision-making areas.

Main Methods:

Functional magnetic resonance imaging (fMRI) was used to record brain activity in human subjects.
Participants made orientation decisions on visual grating stimuli.
Neural activity patterns in the visual cortex were analyzed in relation to stimulus history.

Main Results:

Behavioral reports showed a bias toward the previously presented orientation, confirming serial dependence.
Neural signals in the primary visual cortex (V1) were similarly biased toward the previous trial's orientation.
Both perceptual and neural effects were spatially specific, occurring only when stimuli were presented in the same visual field location.

Conclusions:

Serial dependence in perceptual decisions may stem from neural biases in early sensory cortex.
Recent perceptual history directly influences neural representations in V1.
This provides a neural correlate for how past experiences shape current visual perception.