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Single-Dose Testosterone Administration Impairs Cognitive Reflection in Men.

Gideon Nave1, Amos Nadler2, David Zava3

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Summary
This summary is machine-generated.

Testosterone administration in men reduced cognitive reflection, impairing their ability to override intuitive judgments. This finding suggests a mechanism for testosterone

Keywords:
cognitive reflectiondual processimpulse controlneuroeconomicsopen dataopen materialssingle administrationtestosterone

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Area of Science:

  • Neuroendocrinology
  • Cognitive Psychology
  • Behavioral Science

Background:

  • Testosterone influences reproductive behaviors in nonhumans.
  • In humans, testosterone is linked to aggression and impulse control disorders, but underlying mechanisms are unclear.
  • A dual-process framework suggests testosterone may reduce cognitive reflection.

Purpose of the Study:

  • To investigate the neuropsychological mechanisms of testosterone's behavioral effects in humans.
  • To test the hypothesis that testosterone reduces cognitive reflection.

Main Methods:

  • The largest study to date on testosterone administration effects.
  • 243 men received either testosterone or placebo.
  • Participants completed the Cognitive Reflection Test (CRT) to assess cognitive reflection.

Main Results:

  • Testosterone administration significantly reduced scores on the Cognitive Reflection Test.
  • This effect persisted after controlling for age, mood, math skills, and belief about treatment.
  • The reduction in cognitive reflection was observed across all individual questions of the CRT.

Conclusions:

  • Testosterone administration impairs cognitive reflection in men.
  • This provides a potential mechanism for testosterone's influence on human judgment and decision-making.
  • The findings offer novel, testable predictions for future research on testosterone's behavioral effects.