Learned value and object perception: Accelerated perception or biased decisions?

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Decision Making

Background:

• Learned value influences visual search, directing attention to rewarding stimuli.
• The precise stage of visual processing affected by learned value remains unclear.
• Investigating learned value's impact on preattentive processing is crucial for understanding attentional mechanisms.

Purpose of the Study:

• To determine if learned value affects preattentive visual processing.
• To differentiate between effects on perceptual processing speed and response bias.
• To elucidate the role of learned value in visual attention.

Main Methods:

• Four experiments employed temporal order judgments and simultaneity judgments.
• Stimuli were assigned high or low value using a nonmonetary reward task.
• Prior-entry and response bias effects were assessed to probe processing stages.

Main Results:

• The value-driven distraction effect was replicated, validating the reward task.
• High-value stimuli, unlike low-value ones, exhibited a prior-entry effect.
• No evidence for accelerated preattentive processing of high-value stimuli was found across tasks.

Conclusions:

• Learned value biases perceptual decisions for valued stimuli.
• This bias does not stem from speeding up preattentive stimulus processing.
• Findings suggest learned value modulates later stages of visual processing or decision-making.