Social expectations bias decision-making in uncertain inter-personal situations

Area of Science:

• Social Psychology
• Decision Science
• Behavioral Economics

Background:

• Social cues critically influence interpersonal choices and decision-making models.
• Language is a primary communication tool in social interactions.
• Understanding how linguistic descriptions affect social decisions is crucial.

Purpose of the Study:

• To investigate if positive/negative linguistic descriptions bias decisions in a modified Ultimatum Game.
• To determine if contextual uncertainty modulates the biasing effect of language on social choices.

Main Methods:

• Participants played a modified Ultimatum Game with identical offers.
• Offers were preceded by positive or negative trait-words.
• Contextual uncertainty was manipulated (present or absent).
• Decision acceptance rates and response times were recorded.

Main Results:

• In uncertain contexts, positive descriptions led to higher acceptance rates than negative ones for the same offers.
• Fair offers were accepted more often than unfair offers, irrespective of linguistic valence.
• Decision speed varied: faster acceptance after positive words, faster rejection after negative words.
• These valence effects were significantly reduced when contextual uncertainty was eliminated.

Conclusions:

• Positive and negative social information can bias interpersonal decisions, particularly under high contextual uncertainty.
• Linguistic valence primarily influences social choices when ambiguity is present.
• Contextual uncertainty plays a key role in modulating the impact of social cues on decision-making.