hormones Flashcards
hormone
chemical messengers from brain that travel around bloodstream
determine mood and behaviour
how are hormones tested
physical measures e.g. blood tests and saliva samples
testosterone
secreted by testes
predominantly in males
muscle development and aggression
Dabbs et al
levels of testosterone in 89 male prisoners was higher in those involved in violent crime
- 10/11 of prisoners who committed violent crime had high levels
Higley
despite having high testosterone levels it’s very rare that these individuals actually perform aggressive acts
- weakness as it suggests that situational factors must also determine aggression
cortisol
manages stress levels and inhibits testosterone
dual-hormone hypothesis
suggests an interaction between systems responsible for regulating aggression and stress
- testosterone and cortisol
Carre and Mehta
high levels of testosterone lead to aggression only when cortisol is low
when cortisol is high, testosterone’s influence on aggression is blocked
Arne Popma
supports Carre and Mehta as the association between testosterone and cortisol was found in adolescent males
adrenaline
causes a temporary increase in body activity like heart rate and
activates fight or flight
implications of hormone in aggression theory
development of hormone therapy / chemical castration e.g. Maletsky found injection of anti-androgens in male sexual offenders reduced recidivism rates to 0 in the experimental group
weaknesses of hormone theory
- determinstic
- opposed by SLT