brendgen et el

Question 1

when was brendgen et el

Answer 1

2005

Question 2

whats the sample of brendgen

Answer 2

234 pairs

Question 3

aim of Brendgen

Answer 3

to find the extent to which social and physical aggression are explained by genetics and environmental influences.

Question 4

procedure of brendgen

Answer 4

twin study to calculate the corrolation between MZ and DZ twins who were rated socially and physically aggressive behaviour at 6 years the data reported was then collected

Question 5

what are teacher ratings

Answer 5

teaachers rated social and physical of each child on a three point scale

Question 6

what are peer ratings

Answer 6

aggression was rated by classmates
they had a book of the whole class and had to say who most aggressive was

Question 7

what were the results of brendgen

Answer 7

for social only 20% of teacher ratings and 23% peer rating is down to genetics
physical mostly explained by genetics
social mostly explained by non-shared environments
significant correlation explained by overlaps
high physical agg led to high social agg

Question 8

conclusion of brendgen

Answer 8

data suggests that genetic characteristics predispose some children to aggressive behaviour in general