When a study uses a double-blind procedure, this means that
A. neither the researchers nor the peer reviewers know who is in the experimental vs. the control group.
B. neither the participants nor the peer reviewers know who is in the experimental group vs. the control group.
C. neither the researchers nor the participants know who is in the experimental vs. the control group.
D. neither the researchers nor the experimenters know who is in the experimental vs. the control group.
Answer: C
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