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> There is a clear (and hopefully obvious) association with testosterone levels and aggression. Which is been rather strongly been debunked in the last 20-30 y

by belorn 5y ago

> There is a clear (and hopefully obvious) association with testosterone levels and aggression. Which is been rather strongly been debunked in the last 20-30 years of modern research. Testosterone does not cause aggression, nor does it causes poor concentration. One of the few surviving theories on what testosterone actually do is that it amplify cultural defined behavior associated with social status and sex, primarily during encounters where status might be lost. Abnormal levels of either low or high testosterone is associated with irritability, mood swings, poor concentration, and even delusions. Those findings are quite similar to studies on estrogen and progestogen.

hn_throwaway_99 5y ago
Can you point me to some overviews on this research? I know this is just one example, but I remember the pretty fascinating study linked below quite well, where mens' testosterone levels were the determining factor in seeing how they reacted to their dogs' loss in an agility competition: men with high levels of testosterone punished their dogs by yelling and hitting them, men with lower levels of testosterone supported, petted and praised their animals. I don't think it's that much of a stretch to see how the "high testosterone response" would have been a status benefit to the man in question in the not-too-distant past, but now is much more likely to be a liability. https://news.utexas.edu/2006/09/19/research-reveals-connections-between-owners-testosterone-levels-and-pets-stress/ https://news.utexas.edu/2006/09/19/research-reveals-connecti... https://pubmed.ncbi.nlm.nih.gov/16784746 https://pubmed.ncbi.nlm.nih.gov/16784746
- belorn 5y ago
  Missed that you replied, but he is some directions in case you see this. The first is a meta study done on testosterone by Robert Sapolsky. An other (which is referenced in that one) is a theory called the challenge hypothesis as it applies to humans, which makes predictions that testosterone rise along social status (as it apply to sexual reproduction), and it boost protective behavior in the case that status is challenged. One famous experiment was a version of the game theory experiment called the ultimatum game. If the experiment is carefully constructed in a way where social status is maintained by cooperation, and status is lost by aggression that rewards personal gain, people injected with testosterone behave more cooperative and less aggressive. A noticeable finding was that if participants was told they got injected by testosterone, but it was in reality a placebo, the participant then acted more aggressively and less cooperative, displaying contrast between the effect and the cultural perception. Testosterone has a few other effects, among those is that they disrupt receptors for female hormones that promote maternal behavior and bonding. Dog-human interaction promotes excretion of that female hormone in both humans (men and women) and dogs, a finding that itself has made some news. In modern time, social status still play a huge role. High status for men is highly correlated with successful reproductive success, better health and longer life. The benefit of having testosterone rise after gains in social status is a biological balance act, boosting protective behavior at a time where the potential risk from a loss in social status is at their peak. It also illustrate why testosterone levels goes down after a partner has given birth, as at that time the cost of lower social status is significant less and the benefit of improved bonding capabilities is a reproductive advantage.

by belorn 5y ago

hn_throwaway_99 5y ago

Can you point me to some overviews on this research? I know this is just one example, but I remember the pretty fascinating study linked below quite well, where mens' testosterone levels were the determining factor in seeing how they reacted to their dogs' loss in an agility competition: men with high levels of testosterone punished their dogs by yelling and hitting them, men with lower levels of testosterone supported, petted and praised their animals. I don't think it's that much of a stretch to see how the "high testosterone response" would have been a status benefit to the man in question in the not-too-distant past, but now is much more likely to be a liability. https://news.utexas.edu/2006/09/19/research-reveals-connections-between-owners-testosterone-levels-and-pets-stress/ https://news.utexas.edu/2006/09/19/research-reveals-connecti... https://pubmed.ncbi.nlm.nih.gov/16784746 https://pubmed.ncbi.nlm.nih.gov/16784746

belorn 5y ago
Missed that you replied, but he is some directions in case you see this. The first is a meta study done on testosterone by Robert Sapolsky. An other (which is referenced in that one) is a theory called the challenge hypothesis as it applies to humans, which makes predictions that testosterone rise along social status (as it apply to sexual reproduction), and it boost protective behavior in the case that status is challenged. One famous experiment was a version of the game theory experiment called the ultimatum game. If the experiment is carefully constructed in a way where social status is maintained by cooperation, and status is lost by aggression that rewards personal gain, people injected with testosterone behave more cooperative and less aggressive. A noticeable finding was that if participants was told they got injected by testosterone, but it was in reality a placebo, the participant then acted more aggressively and less cooperative, displaying contrast between the effect and the cultural perception. Testosterone has a few other effects, among those is that they disrupt receptors for female hormones that promote maternal behavior and bonding. Dog-human interaction promotes excretion of that female hormone in both humans (men and women) and dogs, a finding that itself has made some news. In modern time, social status still play a huge role. High status for men is highly correlated with successful reproductive success, better health and longer life. The benefit of having testosterone rise after gains in social status is a biological balance act, boosting protective behavior at a time where the potential risk from a loss in social status is at their peak. It also illustrate why testosterone levels goes down after a partner has given birth, as at that time the cost of lower social status is significant less and the benefit of improved bonding capabilities is a reproductive advantage.