Choosing for others changes dissociable computational mechanisms underpinning risky decision-making

Area of Science:

• Behavioral Economics
• Social Psychology
• Neuroscience

Background:

• Decision-making under risk involves potential consequences for oneself and others.
• The impact of the recipient's identity (e.g., stranger vs. friend) on risky choices is not well understood.

Purpose of the Study:

• To investigate how the identity of another person influences an individual's risky economic choices made on their behalf.
• To compare decision-making for oneself, a stranger, and a close friend.

Main Methods:

• A mixed within- and between-subjects design was employed.
• Participants made three series of risky economic decisions.
• Hierarchical Bayesian estimation analyzed computations underlying decision-making.

Main Results:

• Individuals exhibited increased risk aversion, loss aversion, and consistency when making choices for another person compared to themselves.
• Partner identity moderated risk-taking: participants were more risk-neutral when choosing for friends than strangers.
• Decision consistency increased for choices involving others, particularly friends.

Conclusions:

• Social identity profoundly shapes risky decision-making, with closer relationships leading to more moderate risk-taking.
• The complexity of social interactions is reflected in the nuanced patterns of economic choices.
• These findings highlight the importance of social context in understanding financial behavior.