Operating Principle

2–4 min read

Peeking at a Test Before It Ends Distorts the Result

Peeking at a Test Before It Ends Distorts the Result

Peeking at a Test Before It Ends Distorts the Result

Repeatedly checking a test and stopping when it looks significant inflates false positives.

Repeatedly checking a test and stopping when it looks significant inflates false positives.

Repeatedly checking a test and stopping when it looks significant inflates false positives.

Operating Question

Are you checking results daily and planning to stop the moment they look significant?

Are you checking results daily and planning to stop the moment they look significant?

Are you checking results daily and planning to stop the moment they look significant?

Why It Matters

Supporting Evidence

Research Notes

Practical Actions