How peer influence shapes value computation in moral decision-making

Area of Science:

• Psychology
• Cognitive Science
• Neuroscience

Background:

• Moral behavior is known to be influenced by social factors, particularly peer interactions.
• Understanding the mechanisms of peer influence on moral decision-making is crucial for social and developmental psychology.

Purpose of the Study:

• To investigate how information from peers influences individual moral preferences.
• To determine if peer influence alters the value computation of moral choices based on peers' inferred goals.

Main Methods:

• Utilized drift-diffusion modeling to analyze decision-making processes.
• Conducted two studies involving participants observing and making moral decisions after exposure to prosocial or antisocial peer behavior.

Main Results:

• Participants accurately inferred peer goals from observed moral decisions.
• Exposure to peer moral decisions shifted participants' own preferences to align with those of the observed peers.
• Peer influence affected value computation by increasing the weight of choice attributes aligned with peer goals, independent of initial choice bias.

Conclusions:

• Peer influence significantly alters the subjective value assigned to different choice attributes in moral decision-making.
• Findings suggest mechanisms for both promoting prosocial and mitigating antisocial peer influence on moral behavior.