AO3: Genetic factors

Cards (4)

Strength: Research support
What? Research support for MAOA-L
Who? Lea and Chambers; MAOA-L possessed by 56% New Zealand men and 34% Caucasians
Why? Supports relationship
Limitation: Non-genetic factors
What? Non-genetic factors crucial
Who? Mertins; Knowledge of social norms partly determine aggression
Why? Environmental factors
Limitation: Complex link
What? Precise mechanism unclear in MAOA-serotonin link
Who? Accurate to say serotonin distributed not lower
Why? Relationship not fully understood
Limitation: Problems with twin studies
What? Twin studies lack validity
Who? Environments assumption; dizygotic assumed to share environment to same extent as monozygotic
Why? Concordance rates inflated