What is the name of the system of glands in the body that release hormones?
What are two behaviours associated with testosterone?
Aggression/violence, social dominance, social status, attraction, competition
How did Radke et al. manipulate testosterone levels?
Injections
How do we know from Radke et al.'s study that testosterone influences the brain in response to social threat, and not just in response to other people?
It only impacted the amygdala when viewing the angry faces, not the faces with other emotions.
Why can we not use Radke et al.'s study to explain the actions of a serial killer who murders innocent victims?
Radke et al.'s experiment measures testosterone's activity in the brain in response to social threat - the angry face - and when we're motivated to deal with that threat. In the serial killer scenario, if someone is innocent they're unlikely to be a threat to the killer - in other words, the murder is unprovoked.