Value-driven attentional capture enhances distractor representations in early visual cortex.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Visual Perception

Background:

• Behavioral responses are faster and more accurate to high-value stimuli.
• Task-irrelevant stimuli associated with high rewards can capture attention and impede processing of relevant information.
• The neural mechanisms underlying how distractor value influences attention, particularly in early visual cortex, remain unclear.

Purpose of the Study:

• To investigate whether the value of task-irrelevant distractors influences behavior through competition in early visual cortex or later decision-making stages.
• To assess the fidelity of distractor representations in early visual cortex using functional magnetic resonance imaging (fMRI) and an inverted encoding model (IEM).

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to measure brain activity in human visual cortex.
• A multivariate inverted encoding model (IEM) was applied to analyze neural representations.
• Participants performed a value-based learning task involving task-relevant and task-irrelevant stimuli.

Main Results:

• The fidelity of neural representations for task-irrelevant distractors increased when these distractors were previously associated with high rewards.
• This suggests that value enhances the neural encoding of distractors even when they are not the focus of the task.

Conclusions:

• Value-driven attentional capture initiates with sensory modulations of distractor representations within early visual cortex.
• These findings provide evidence for the role of early visual processing in mediating the impact of reward value on attention and distraction.