What does 'threats to validity' mean?

What does 'threats to validity' mean?

• A. Examining whether the observed change is due to chance or other factors
• B. The process of randomly assigning participants to groups
• C. The steps taken to blind participants
• D. Examining if the intervention caused the change in the subjects and not chance or other factors

Answer: (D)

Threats to validity focus on whether we can truly claim that the intervention caused the observed change, rather than it arising from chance or other factors. The best choice captures this causal question directly: it asks whether the intervention was responsible for the change in the subjects, not just whether the change happened by chance or due to something else. Methods like random assignment and blinding are tools that reduce bias and strengthen validity, but they describe design approaches rather than defining what a threat to validity actually is. The option about whether the change is due to chance or other factors touches on the issue, but it doesn’t explicitly frame the causal attribution the way threats to validity do.

Threats to validity focus on whether we can truly claim that the intervention caused the observed change, rather than it arising from chance or other factors. The best choice captures this causal question directly: it asks whether the intervention was responsible for the change in the subjects, not just whether the change happened by chance or due to something else. Methods like random assignment and blinding are tools that reduce bias and strengthen validity, but they describe design approaches rather than defining what a threat to validity actually is. The option about whether the change is due to chance or other factors touches on the issue, but it doesn’t explicitly frame the causal attribution the way threats to validity do.