Social status modulates the neural response to unfairness

Area of Science:

• Neuroscience
• Social Psychology
• Behavioral Economics

Background:

• Human societies are structured by social hierarchies, leading to unequal resource distribution based on social status.
• Understanding how social status impacts fairness perception is crucial for social and economic behavior.

Purpose of the Study:

• To investigate the effect of social status on fairness perception in an asset allocation task.
• To identify the neural correlates underlying social status's influence on fairness perception.

Main Methods:

• Participants engaged in a math competition to establish social status (high or low).
• Following the competition, participants played an Ultimatum Game (UG) involving asset allocation.
• Brain activity and functional connectivity were measured using neuroimaging techniques.

Main Results:

• Participants with high social status were more likely to reject unfair offers in the UG compared to those with low status.
• Social status effects correlated with activity in the right anterior insula (rAI) and functional connectivity between rAI and anterior middle cingulate cortex.
• Interactions between social status and offer fairness were observed in the amygdala and thalamus.

Conclusions:

• Social status significantly modulates fairness perception and decision-making in economic games.
• The right anterior insula and anterior middle cingulate cortex play a key role in integrating social context and norms for fairness evaluation.
• The amygdala and thalamus are involved in modulating fairness perception based on social status.