brendgen Flashcards
what year
2006
what was the aim
using MZ and DZ twins to see if aggression is biological or environmental
what design did he use
twin study design
who rated the students for aggression
teachers and peers
how did teachers rate
3 point scale in response to statements
how did peers rate
shown photos, matched them to predetermined statements about aggressive behaviour
what percentage was explained by genetics for social aggression
20% teachers and 23% peers
what impacted physical aggression more
genetic factors
what does a moderate correlation between social and physical aggression show
overlapping genetic influences
which type of aggression can cause the other
physical can cause social
give a conclusion
further analysis shows environmental factors are more influential on specific types of aggression
give a strength of the study
multiple data sources (teachers + peers) = more reliable
give a weakness of the study
potentially invalid assumptions, based on equal environments, undermines validity of method
give an application for this study
reducing aggression by effective interventions
