Evidence-Based Practice / Unit 6 EBP 0771 short lesson, about 20 seconds
Confounding Variables
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The idea
A confounding variable is a factor other than the intervention that could account for the outcome observed.
In practice
Two groups differing in an unmeasured characteristic that affects the outcome.
Where people slip
A confounder is not a flaw in reasoning. It is a real feature of the world the study failed to hold constant.
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