Exogenous Testosterone Increases Decoy Effect in Healthy Males.

Area of Science:

• Neuroeconomics
• Social Cognition
• Behavioral Economics

Background:

• Growing interest in testosterone's influence on economic decision-making and social cognition.
• Lack of empirical studies on testosterone's modulation of the decoy effect in choice sets.

Purpose of the Study:

• To investigate whether testosterone administration affects decision-making in the presence of an asymmetrically dominated decoy option.
• To determine if testosterone influences the decoy effect, a phenomenon where a third option sways choices.

Main Methods:

• Double-blind, placebo-controlled, between-subjects design with 63 healthy male participants.
• Administration of a single 150 mg dose of testosterone gel or placebo.
• Decision-making task assessing the decoy effect 180 minutes post-administration.

Main Results:

• Testosterone group exhibited less consistent choices compared to the placebo group.
• Participants receiving testosterone showed a greater decoy effect, indicating increased preference for the dominating option.
• Findings align with dual-process theory, suggesting testosterone enhances intuitive decision-making.

Conclusions:

• Testosterone administration can modulate economic decision-making by increasing susceptibility to the decoy effect.
• Testosterone appears to promote more intuitive and automatic judgments, influencing choice consistency.
• This study provides empirical evidence for testosterone's role in cognitive processes underlying economic choices.