Think Better · 45 sec
Selection bias
A compact thinking tool for spotting patterns and avoiding mistakes.
The useful idea
- The useful idea
Selection bias is the bias introduced by the selection of individuals, groups, or data for analysis in such a way that the association between exposure and outcome among those selected for analysis
- How it works
differs from the association among those eligible.
- Why it matters
It typically occurs when researchers condition on a factor that is influenced both by the exposure and the outcome (or their causes), creating a false association between them.
Why this matters
Use Selection bias as a quick check before trusting your first conclusion.
Try this
Use Selection bias as a quick check before trusting your first conclusion.
Test your recall
Which idea belongs to the explanation of Selection bias?
- How it works
- The useful idea — correct
- Why it matters
Selection bias is the bias introduced by the selection of individuals, groups, or data for analysis in such a way that the association between exposure and outcome among those selected for analysis