Endocrinology - Testos & trust

5 important questions on Endocrinology - Testos & trust

What is the effect of testosterone on trust?

Decreases trust in socially naive humans

How to measure trust?

Facial trustworthiness task

  • "how trustworthy do you rate this (wo)man?" with scale

Findings of the facial trustworthiness task.

  • Testos decreased trust of participants

HOWEVER:
  • testos also protects against naivety
  • has an adaptive function
  • has effect on interpersonal trust
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How is the OFC involved in evaluation of trustworthiness?

  • Testos decreased connectivity between amygdala & OFC during judgement of unfamiliar faces
  • testos increased amygdala responses specifically to faces rated most untrustworthy

What is a neurobiological explanation for these findings about trustworthiness?

In uncertain social situation, testos induces sustained decoupling between FC & amygdala by a prefrontal-dopaminergic mechanism, resulting in more vigilant responses of amygdala to signal untrustworthiness

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