As a part of a medical research study,a researcher exposes two groups of participants either to an actual painkiller or a sugar pill.The participants feel their pain being eliminated even with the sugar pill.In this case,the sugar pill is known as the:

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The sugar pill is known as the placebo, which is a substance or treatment that has no therapeutic effect, but is given to the participants as if it were a real treatment. This is done to control for the placebo effect, which is the phenomenon where a participant's expectations and beliefs about a treatment can actually produce a physiological response, even if the treatment itself is inert.

As a Part of a Medical Research Study,a Researcher Exposes