Aggression - Biological

Question 1

McGuffin and Gottesman

Answer 1

Concordance Rate
87% MZ twin pairs
72% DZ Twin pairs
significant genetic contribution to aggressive behaviour

Question 2

Jim Fallon

Answer 2

Case Study
Damage to orbital cortex and temporal lobe
He had same pattern as psychopathic people

Question 3

Largerspetz

Answer 3

25 generations of mice
Super-aggressive and docile mice
showed in animals a genetic component to aggressive behaviour

Question 4

Brunner

Answer 4

family in Netherlands
found gene marker present in all violent men but not the non-violent men.
Gene for MAOA - excess levels of neurotransmitters

Question 5

Mann et al

Answer 5

35 healthy adults
dexfenfluramine - depleted serotonin levels in the brain
hostility and aggression levels increased with the drug
Used as an appetite suppressant so could just be hungry.

Question 6

Ferrari

Answer 6

Allowed rat to fight at the same time every day for ten days.
Researchers measured the amount of dopamine in the brain at the time on the 11th day.

Question 7

Dabs et al

Answer 7

Testosterone levels in male inmates

Positive correlation between higher testosterone and violent crimes