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Randomized Block Design

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by

Deana Middleton

on 21 September 2013

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Transcript of Randomized Block Design

THE ARTICLE

EXAMPLE

That is the question

TO BLOCK OR NOT TO BLOCK….

Random assignment of participants
Taking out bias in relation to the block
Taking out a factor
Variability should be lower in the blocks than as the whole
Does not affect what participants experience
Blocks have to be equal

WHAT IT IS

RANDOMIZED BLOCK DESIGNS

Katie Barker
Deana Middleton

WHEN TO BLOCK
Supported by the literature
Only beneficial when blocks are more homogeneous
If planning to block, do it before assignment to the group—ex. control or treatment
Full transcript