Psy137HormonesandSocialBehavupdate

Chemical castration(steroid inhibitors seem to

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Unformatted text preview: Chemical castration (steroid inhibitors) seem to decrease sex-related but not other kinds of aggression Positive correlation between a M T level & amount of aggressiveness Theory predicts this should only hold for situations of competition & status, resources, related to reproduction Blood levels of 5 men confined to a boat for 14 days was correlated with their place in the dominance ranking Problem of causation Winning a game increases T of female prisoners and behavior deer stags Testosterone & Competition Winning a game increases T in males Increase in mood as well Highest for contact sports but still there for chess Highest rises in T if the attribution was that the win was from skill or technical ability rather than chance • Thought contact sports trigger physical competition mechanisms Losing a game decreases T in males Decrease in mood as well Interaction with attributions Both losing players decrease T but it is less of a decrease if the player makes external attributions to why the other team won • Bad calls by the referee • Bad luck External attributions may be protective against lowering T and associated feeling bad Some evidence that the level of T before the game (which rises in anticipation) can be predictive of whether or not they win Interaction with others Both basketball and soccer fans show a small decrease in T if their team loses and a small increase if their team wins testosterone of sports fans testosterone increases future wins predicts that testosterone will be elevated only during specific times of an individual’s life history Just the Right Amount… Agression/Testosterone Link Problems with determining causality with the agression/testosterone direction 3 rd variables Example--Violent prisoners may differ in many ways from less nonviolent prisoners (e.g., in stress, family history, etc.) Still correlational and not a random sample • Cannot imply causation Genetic Influences Are people who are more aggressive genetically different from those who are less aggressive? Can breed animals to be more or less aggressive Genetic influences Twin studies Based on the assumption that identical twins should show greater similarity on any trait that is presumed to be inherited than fraternal twins • Identical twins = twice as likely as fraternal twins to have similar degree of criminal activity – Christiansen: 7000 twins born in Denmark 1881-1910 – 35% identical vs. 13% fraternal showed similarity in serious criminal activity...
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Chemical castration(steroid inhibitors seem to decrease...

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