Pre-existing brain states predict risky choices

Area of Science:

• Neuroscience
• Cognitive Science
• Behavioral Economics

Background:

• Traditional economic models assume rational decision-making based on problem properties and utility.
• The influence of internal brain states on economic choices remains an area of investigation.

Purpose of the Study:

• To investigate whether pre-stimulus endogenous neuronal fluctuations bias economic decisions.
• To challenge the view that choices solely reflect stable underlying utility distributions.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to record subjects' pre-stimulus neural activation.
• Subjects made choices between pairs of certain outcomes and risky gambles.

Main Results:

• Activity in the left nucleus accumbens and medial frontal gyrus significantly biased subsequent risky decision-making.
• These brain regions are associated with uncertainty and reward processing.

Conclusions:

• Endogenous neural states, potentially arising from systematic causes or neural noise, play a role in shaping economic decisions.
• Findings challenge economic theories that propose choices merely reveal stable hedonic utility distributions.