Cross-modal effects of value on perceptual acuity and stimulus encoding

Area of Science:

• Neuroscience
• Cognitive Science
• Sensory Perception

Background:

• Cross-modal interactions are fundamental to perception.
• Reward associations are crucial for adaptive behavior.
• The influence of reward on one sensory modality's perception by another is largely unknown.

Purpose of the Study:

• To investigate if reward associations from auditory stimuli affect visual perception.
• To explore the neural mechanisms underlying potential cross-modal reward effects.

Main Methods:

• Participants performed a visual task while exposed to auditory stimuli with varying reward associations.
• Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
• Multivariate decoding and univariate analyses examined stimulus representation and regional modulation.

Main Results:

• Auditory stimuli with high-reward associations significantly increased visual perception sensitivity.
• This effect correlated with enhanced multivariate decoding accuracy in the visual cortex.
• Modulation in multisensory processing regions predicted behavioral effects more strongly than in classical reward regions.

Conclusions:

• Value-driven cross-modal interactions can enhance sensory perception.
• Multisensory processing areas may play a key role in transferring value signals across sensory modalities.
• These findings offer insights into attention-like modulatory effects driven by value.