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Unformatted text preview: from different treatments. For example blinding either subjects or those who evaluate responses or both • single-blinding • double-blinding Placebo- fake treatment 2. Block. Block or match subjects to reduce variability of responses to the same treatment. 3. Randomize. An experiment requires a random assignment of experimental units to treatments. Randomization allows to equalize the effects of uncontrollable sources of variation. • completely randomized design- all experimental units have the same chance to receive any treatment • randomized block design- randomization occurs only within blocks 4. Replicate. Replicate over as many subjects as possible and replicate entire experiment with different groups of subjects...
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- Summer '08
- future outcomes EXPERIMENTS, replicate entire experiment, Control. Control sources