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.

Question

Quizplus · Accepted Answer

The double-blind procedure is the most appropriate technique to prevent any expectations about brand effectiveness from influencing the experimental test. This procedure involves assigning the participants to different groups randomly and administering different brands of pain medication while keeping both the participants and the experimenters unaware of which brand is being administered to which participant. This helps to eliminate bias and maintain the integrity of the experiment.

A Group of Experimenters Want to Test the Effectiveness of a Well-Known