How testosterone administration affects learning to avoid harm in healthy men: A double-blind, placebo-controlled...

Area of Science:

• Behavioral neuroendocrinology
• Moral psychology
• Computational neuroscience

Background:

• Harm avoidance is crucial for social functioning.
• Distinct learning mechanisms may underlie self- versus other-directed harm avoidance.
• Hormonal influences, particularly testosterone, on these processes are not fully understood.

Purpose of the Study:

• To investigate the effects of testosterone administration on harm-avoidance learning in men.
• To differentiate learning processes for self- versus other-directed harm avoidance.
• To explore the computational mechanisms underlying these effects.

Main Methods:

• 120 healthy men received a single dose of testosterone or placebo.
• Participants completed a harm-avoidance task assessing learning over trials.
• Computational modeling using a dual learning rate reinforcement model quantified behavior.

Main Results:

• Testosterone enhanced learning from negative outcomes and suppressed learning from positive outcomes in the self-harm condition.
• Testosterone did not alter learning rates in the other-harm condition.
• Testosterone slowed prosocial learning from negative outcomes and altered its relationship with trait anxiety.

Conclusions:

• Testosterone administration influences harm-avoidance learning in a self-protective manner.
• Findings suggest testosterone may modulate strategic prosocial behavior.
• This study provides computational insights into hormonal effects on moral learning.