In the _________________ experimental design, neither the participants nor the researchers are aware of each participant's assignment (test or placebo) or the outcome of the study until it is completed.
Rev: 03_17_2014_QC_47029

Question

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In a double-blinded experimental design, both the participants and researchers are unaware of the participants' assignment and study outcomes until completion. This is done to prevent bias and increase the validity of the study. The other options listed (animal model, case control, and clinical trial) do not necessarily involve this level of blinding.

In the _________________ Experimental Design, Neither the Participants nor the Researchers