ATI TEAS (Test of Essential Academic Skills) Version 7ReadingHard
A public health announcement states: 'Recent studies indicate a strong correlation between regular physical activity and reduced risk of chronic diseases such as heart disease and Type 2 diabetes. However, correlation does not imply causation.' What is the primary implication of the statement 'correlation does not imply causation' in this context?
- AThe observed relationship is purely coincidental.
- BLifestyle factors other than physical activity are more important.
- CPhysical activity has no actual effect on chronic disease risk.
- DMore research is needed to establish a direct cause-and-effect relationship.
Show answer & explanationAnswer & explanation
Correct answer: D. More research is needed to establish a direct cause-and-effect relationship.
The statement 'correlation does not imply causation' acknowledges that while two things may occur together (physical activity and reduced disease risk), it doesn't automatically mean one directly causes the other. It signals that further, more rigorous research (like randomized controlled trials) is required to definitively prove a causal link.
Why the other options are wrong
- A. A 'strong correlation' is unlikely to be 'purely coincidental'; it suggests a real relationship, even if not directly causal.
- B. The statement is about the *type* of relationship observed (correlation vs. causation) for physical activity, not about prioritizing other factors.
- C. This is too strong; correlation suggests a relationship that *might* be causal, but further proof is needed.
Correlation vs. Causation
Correlation indicates a relationship between two variables, while causation means one variable directly causes a change in another. Correlation does not automatically mean causation.
- Correlation: variables change together.
- Causation: one variable directly influences another.
- Observational studies show correlation; experimental studies show causation.
Memory trick: CORRELATION is a HINT, not a CAUSE. Needs more PROOF.