Comparing Charlton et al (2000) and Williams et al (1981)

== Similarities ==
* Both were natural experiments. No control over the introduction of TV. 
* Conducted in real life communities which both had never had access to broadcast television. 
* Variables outside the control of both studies: other children or parents' behaviour. 
* Both studies conducted observations to measure the amount of aggression children displayed. 
* Both studies used questionnaires to ask teachers and parents about their children's behaviours. 
== Differences ==
* St Helena was so remote that it had developed a unique culture of parental control. Notel was not unique in this way. 
* On St Helena most people knew each other, and their families managed to keep better watch over children. 
* Notel was on the mainland and had access to popular cultural trends which may have been different in levels of aggression shown. 
* Adults on St Helena may have been reluctant to admit that the children had aggressive behaviour 
== Summary ==
Summary of these main points. 
Similarities 	Differences
They were natural experiments	St Helena was a remote island, 
Notel was in the mainland
They were real communities 	Differen sense of community
Both communities never had access to 
television prior to these studies	Different guidance and parental monitoring
Both studies conducted observations and
used questionnaires to measure aggression.	Cultural differences between the locations
== Conclusion ==
* Children are affected by watching TV
* Effect of violent tv can be reduced by parental guidance and community support 
* Living in smaller neighbourhoods with a strong sense of community helps
* However, aggression can be caused by other factors, such as friendship groups, biological factors and triggers in the environment.