A study finds children who watch more TV have lower test scores. Which conclusion is unjustified?
- Acheck_circle
Watching TV directly causes lower test scores.
- B
There may be confounding variables (study habits, parenting, etc.).
- C
There is a negative correlation between TV watching and test scores.
- D
Further controlled studies are needed for causation.
Explanation
Observational correlation does not establish causation; confounding variables may exist.