Inactive substances similar to the experimental drugs given to test the power of expectations are called:

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Placebos are inactive substances used in clinical trials and medical research to simulate the effects of an experimental drug. They are used as a control group to compare the effects of the active drug with the effects of no treatment or a placebo. Distracters refer to irrelevant stimuli or information that can interfere with the desired response in a study. Controls are experimental conditions that remain constant throughout the study to ensure that any changes observed are due to the manipulation of the independent variable, and dependent variables are the outcomes or measures being observed and analyzed in a study.

Inactive Substances Similar to the Experimental Drugs Given to Test