Evidence-Based Practice / Unit 22 EBP 3186 short lesson, about 20 seconds
Randomized Block Design
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The idea
A randomized block design forms blocks of similar participants and randomises within each block, combining the control blocking gives with what randomisation handles.
In practice
Blocks formed by ward, with assignment randomised inside each ward.
Where people slip
The design is only as good as the blocking variable chosen, and choosing it requires knowing what actually differs between your settings.
Your place on the trail
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