ˌdouble-ˈblind BrE AmE adjective technical
a double-blind scientific test or study compares two groups in which neither the scientists nor the people being studied know which group is being tested and which group is not
ˌdouble-ˈblind BrE AmE adjective technical
a double-blind scientific test or study compares two groups in which neither the scientists nor the people being studied know which group is being tested and which group is not
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012