An investigator wishes to conduct a double-blind study to determine the effect of an experimental drug on memory. The investigator gives the drug to members of the experimental group and a ____ to members of the control group.

Question

Quizplus · Accepted Answer

The investigator would give a placebo to the control group, which is a substance that looks identical to the drug but has no therapeutic effect. This ensures that any changes in memory observed in the experimental group are due to the drug and not other factors such as the placebo effect or demand characteristics. A random sample may be used to select participants for the study, but it is not relevant to the question of what the control group will receive. The mode is a statistical concept and not relevant to experimental design.

An Investigator Wishes to Conduct a Double-Blind Study to Determine