brendegen

Question 1

what was bredgens aim

Answer 1

to investigate if social agression could be caused by genes or environment

Question 2

what was Brendan sample

Answer 2

234 6 yr old twin pairs

Question 3

how many where monozygotic

Answer 3

94 pairs

Question 4

how many where dizygotic

Answer 4

67 pairs

Question 5

when where all the pairs born

Answer 5

1995-1998c

Question 6

what design was it

Answer 6

longitudinal

Question 7

what was the procedure

Answer 7

the teacher filled in two questionnaires on the twins- asking questions on social aggression ‘ tries to make a child dislike another child’or physical aggression on a three point scalechildren given pictures of thier class mates and circle children who best fit description

Question 8

what where brendegens findings

Answer 8

their was a much higher correlation between the ratings of mz twin pairs on physical agression compared to same sex dizygotic twin pairs
peers more likely to find boys more physically agressive and girls more socialy agressive

Question 9

what did brendegen conclude

Answer 9

there is a strong genetic component to physical agression but not social agression