Biological Explanations Of Aggression Flashcards
Scerbo & Raine
Neural mechanisms. Meta-analysis: 29 studies that examined serotonin levels in anti social children and adults consistently found low levels of serotonin (esp. In those who attempted suicide)
Olds & Milner
neural mechanisms. Found that when brains of rats were stimulated with dopamine release the rats would repeatedly press the triggering lever up to 2,000 times per hour. They even stopped feeding/drinking/sex.
Gottesman
Genes–found concordance rates of 87% for MZ twins and 72% for DZ twins. (-DZ not very different, suggesting strong family influence) (-MZ not 100%>other factors? SLT?) (-maybe MZ simply treated more similarly?)
Brunner’s Dutch Family
All sons and father showed symptoms of extreme aggression (all raped sister) and all had defective MAOA gene (low serotonin and high dopamine) *-good mothering in monkeys with defective MAOA appears to protect against aggression…parenting?
Phineas Gage
Biological explanations of aggression-neural mechanisms-brain structure. Case study:man has metal pole go through his frontal love and survived but became angry and aggressive.
Danish Study
Genes-adoption studies. 14k boys adopted. Found a positive correlation between those with convicted fathers and boys own criminal records/aggressive behaviour.
Dabbs
Hormones: found that violent criminals have higher levels of testosterone.
*cause and effect?
Dog Aggression Study
Neural Mechanisms: 80 aggressive dogs compared to 80 non aggressive dogs. Found low serotonin levels in the aggressive dogs.