What kind of relationship can pictures of the living brain establish with regard to behaviour?

• A. Correlation between brain and behaviour
• B. Causation
• C. Temporal sequence
• D. No relationship

Answer: (A)

Pictures of the living brain mainly reveal a correlation between brain activity and behaviour. When you scan people while they perform a task, you often see certain regions lighting up more in association with specific behaviours, and less activation when the behaviour isn’t present. That pattern shows that brain activity and behaviour go together, but it doesn’t prove that one causes the other. There could be a third factor driving both, or the direction of influence could be bidirectional. To claim causation, you’d need experimental manipulation or evidence showing that changing brain activity leads to a change in behaviour, not just a concurrent pattern seen in imaging.