> 10/11 inmates who were violent had higher testosterone levels
> Proves that higher levels arelinked to violence
> Measured using objective data from saliva samples
How is Higleys study refuting evidence?
> Individuals with elevated testosterone levels exhibit signs of aggression but rarely commit aggressive acts; social and cognitive factors play a mediating role
> Higher testosterone doesn't lead to violence acts, other factors play a role
How is Bartzman's study supporting evidence?
> Cortisol levels in 17 7-9 year old boys, who were aggressive, showed a greater morning-to-evening
> Objective data is free from any researcher bias which increases credibility
How does it lose credibility?
> Link between hormones and aggression is typically correlational, doesn't allow for cause and effect statements
> Direction of effects is unclear
> High levels could be the result of aggression, not the cause
How does it produce objective evidence?
> Barzman + Dabbs use standardised tests of saliva
> Carefully controlled
> Credibility
How is it reductionist?
> Theories of human aggression are separated into hormones
> Doesn't factor in other factors such as social factors