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Related Experiment Video

Updated: Jun 4, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

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Published on: March 18, 2019

Reward sharpens orientation coding independently of attention.

Stefano Baldassi¹, Claudio Simoncini

¹Department of Psychology, University of Florence Florence, Italy.

Frontiers in Neuroscience

|March 4, 2011

Summary

Rewarding stimuli enhance performance by improving sensory processing, independent of attention. This study shows reward sharpens orientation discrimination and tuning functions, suggesting early sensory stage modulation.

Keywords:

attention orientation discrimination reward

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Area of Science:

Neuroscience
Cognitive Science
Psychophysics

Background:

Reward is known to improve performance, but the underlying neural mechanisms remain debated.
It is unclear if reward effects are mediated by high-level cognitive processes or low-level sensory changes.
Previous research suggests primary sensory areas might be involved in reward modulation, but dissociation from attention is lacking.

Purpose of the Study:

To investigate whether reward can independently enhance perceptual performance.
To determine if reward effects are mediated by low-level sensory mechanisms or high-level cognitive control.
To dissociate the effects of reward from attention in perceptual tasks.

Main Methods:

A psychophysical dual-task paradigm was employed to control for attentional load.
Participants performed orientation discrimination tasks with targets associated with varying reward levels.
Performance was measured using orientation discrimination thresholds and behavioral tuning functions.

Main Results:

Reward significantly improved orientation discrimination thresholds by approximately 50%.
Higher reward rates led to sharpened behavioral tuning functions.
These improvements were observed regardless of attentional load or reward cue association.

Conclusions:

Reward enhances perceptual performance within a single trial, independent of attention.
Reward appears to modulate early sensory stages by improving the signal-to-noise ratio.
Findings suggest a direct role for reward in refining sensory processing.