evaluation of twin studies

Question 1

what is a strength of a twin study?

Answer 1

high concordance rate

Question 2

what did ishikawa and raine find?

Answer 2

high concordance rate for identical twins than non-identical

Question 3

what is a limitation of twin studies?
(blgy)

Answer 3

biology of criminals

Question 4

why is the biology of criminals a limitation?

Answer 4

high concordance rate may be due to sharing the same:
. home
. school
parents may treat identical twins more alike- shared environments might cause similarities in their criminal behaviour

Question 5

what is another limitation of twin studies?
(percentage)

Answer 5

concordance rates

Question 6

why are concordance rates a limiation of twin studies?

Answer 6

never 100% for monozygotic twins
- if there was a gene, it would be impossible for one to have it and not the other

• gene could make them vulnerable but must be triggered by something
  eg. environment

Question 7

what is another limitation of twin studies?
(isolation)

Answer 7

low validity

Question 8

why is low validity a limiation of twin studies?

Answer 8

impossible to isolate and measure the effects of genes seperately from environmental effects