Multiple Choice
A group of experimenters want to test the effectiveness of a well-known and expensive brand of pain medication against the effectiveness of a lesser-known and cheaper brand.To prevent any expectations about brand effectiveness from influencing their experimental test,the researchers are likely to make use of
A) random sampling.
B) replication.
C) operational definitions.
D) the double-blind procedure.
Correct Answer:
Verified
Correct Answer:
Verified
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