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What was the sample?

What did Raine find?

Why was it suggested that this area linked to aggressive and violent behaviour?

What does serotonin do?

What does low levels of serotonin mean?

What did Davidson et al find?

What are some issues with research investigating the brain?

What are some issues with causation with genetic and neural explanations?

What are some problems with twin studies?

Which type of twins may be treated more similar to each other?