Word:

double-blind study

Noun1.double-blind study - an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment; a double-blind procedure is used to guard against both experimenter bias and placebo effects
double-blind experiment, double-blind procedure, experimental procedure
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double vision
Double voucher
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double-barrelled
double-bass
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double-bedded
double-bitted ax
double-bitted axe
double-blind experiment
double-blind procedure
-- double-blind study --
double-bogey
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double-breasted jacket
double-breasted suit
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double-check
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double-click
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double-crossing
double-date
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Double-dye
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