Abdul has volunteered to participate in an experiment evaluating the effectiveness of aspirin.Neither he nor the experimenters know whether the pills he takes during the experiment contain aspirin or are merely placebos.The investigators are apparently making use of
A) naturalistic observation.
B) a confounding variable.
C) the double-blind procedure.
D) random sampling.

Question

Quizplus · Accepted Answer

The double-blind procedure involves both the participants and experimenters being unaware of who is receiving the treatment and who is receiving the placebo. This helps eliminate bias and increases the validity of the results. Therefore, Abdul's participation in the experiment, where he and the experimenters are unaware of whether he is taking aspirin or a placebo, is an example of the double-blind procedure.

Abdul Has Volunteered to Participate in an Experiment Evaluating the Effectiveness