To see if there is a relationship between social and physical aggression and to see what extent social aggression can be explained by environment and genetics
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How many participants were there?
322 twin pairs from Quebec with 237 same sex pairs
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How was the study carried out?
Teachers rated the children's social and physical aggression levels and then the children were asked to circle the three photos who fit behaviour descriptions (two for social and two for physical aggression)
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What were the results of the study?
Boys were said to be more physically aggressive and girls more socially aggressive. There was a high correlation in MZ twins for physical aggression and all twins had similar ratings on social aggression
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What was concluded from the study?
That physical aggression is down to genetics whereas social aggression was said to be down to the environment
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Why was the study high in validity?
The children were asked not to share their answers which would eliminate demand characteristics
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Why is the sample a strength?
Because it was a very large sample for a twin study which means it is more generalisable to the wider twin population
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Why are the results reliable?
Because it was quantitative data which means the results can be analysed and compared which makes them more credible and reliable
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What problem is there with the results?
It doesn't provide a lot of depth so it cannot be offered as a whole explanation
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What ethical issues may there be?
There are children in the study so there could be consent issues
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Why was the sample an issue?
There wasn't enough types of twins and the results may not be applicable to people who aren't a twin
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Other cards in this set
Card 2
Front
How many participants were there?
Back
322 twin pairs from Quebec with 237 same sex pairs
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