Hypothetical and real choice differentially activate common valuation areas.

Area of Science:

• Decision Neuroscience
• Neuroeconomics
• Cognitive Neuroscience

Background:

• Hypothetical choices are frequently used to infer real-world decision-making.
• A key question is whether hypothetical and real decisions utilize identical valuation and choice computations.

Purpose of the Study:

• To investigate if the brain employs the same valuation and choice computations for both real and hypothetical decisions.
• To identify neural correlates underlying differences between real and hypothetical choice behavior.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to monitor brain activity in human subjects.
• Subjects made both real and hypothetical purchasing decisions for consumer goods.
• Brain activity was correlated with behavioral measures of stimulus value for each decision type.

Main Results:

• Activity in the orbitofrontal cortex and ventral striatum correlated with stimulus value in both real and hypothetical decisions.
• These brain regions exhibited significantly stronger activity in response to stimulus value during real choices compared to hypothetical ones.
• The findings indicate that differences in value computation within these regions, not distinct valuation systems, differentiate real from hypothetical choices.

Conclusions:

• The medial orbitofrontal cortex and ventral striatum play a crucial role in modulating value computations between real and hypothetical decisions.
• The underlying valuation systems appear consistent across both decision types.
• The observed differences in neural activity primarily stem from variations in the magnitude of value computation, particularly in the medial orbitofrontal cortex and ventral striatum.