Evidence-Based Practice / Unit 22 EBP 3167 short lesson, about 20 seconds
Randomization Controls What You Did Not Think Of
Captions available
The idea
Random assignment distributes both known and unknown characteristics across groups, which is why the experimental design sits where it does in the hierarchy.
In practice
Two groups made comparable by allocation rather than by matching.
Where people slip
Unit 06 distinguished random assignment from random sampling. The first is what buys this; the second is about who was recruited.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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