Selection bias in studies with unequal allocation [electronic resource] / Olga M. Kuznetsova.
Material type:
Animated audio-visual presentation with synchronized narration.
Title from title frames.
Contents: Origins of selection bias in clinical trials -- Blackwell-Hodges model for selection bias -- Derivation of selection bias with unequal allocation -- Directional guessing strategy -- Directional guessing strategy with permuted block randomization -- Directional strategy maximizes selection bias -- Directional strategy with biasing threshold -- Directional strategy with biasing threshold and large permuted blocks -- Brick Tunnel Randomization -- Undisclosed use of the Brick Tunnel Randomization reduces selection bias.
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Mode of access: World Wide Web.