Dr. Volz is a researcher who wants to distinguish between the direct effects of a new antianxiety medication and effects arising from expectations of the drug's effectiveness. Dr. Volz is most likely to use a method known as

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The double-blind procedure is a research method where both the participant and the experimenter are unaware of who is receiving the treatment or placebo. This method allows the researcher to control for the placebo effect, which can occur when participants' expectations of a treatment's effectiveness influence their responses. By using a double-blind procedure, Dr. Volz can compare the effects of the actual medication with the effects of simply expecting to receive the medication.

Dr Volz Is a Researcher Who Wants to Distinguish Between