Aggression- Genetic Flashcards
Which two researchers studied adoption
Hutching and Mednick
Rhee and Walden
Which two researchers studied twins?
McGuffin and Gottesman
Christiansen
What was the concordance rate for MZ and DZ twins in McGuffin and Gottesman’s research
87% MZ
72% DZ
Other than genes, what else is suggested to influence aggression
Environment
How many pairs of twins were used in Christiansen’s research, and how many were registered for criminal activity
3538 pairs
926 registered
What were the concordance rates for MZ and DZ twin females and males in Christiansen’s research
35%male MZ
21% female MZ
12% male DZ
8% female DZ
What did Hutching and Mednick do?
Case study
1400 adoptions in Denmark
Found positive correlation between number if convictions of bio parents (mainly fathers) and number of convictions among sons
What did Rhee and Walden do
Meta analysis 51 twin and adoption studies
87000 individuals
Psychiatric diagnoses
Delinquency behaviours
Suggested 60% environment
40% genes
What Neurotransmitters are involved in agg
Noradrenaline
Serotonin
Dopamine
What gene breaks down the Neurotransmitters
MAOA
What happens if he gene for MAOA is faulty
MAOA is not produces
Which leads to imbalances in chemicals
Leads or aggression
What are the evaluation points for the twin studies
Twins are likely to share environment
Twins are treated the same
What are the evaluation points for adoption studies
Contamination effect
Adoption process may play a role- unloved etc
Evaluation points of the genetic explanation of agg
Too simplistic
Deterministic
