Question

A medical researcher prepares a number of doses of saline solution placebos. This is a mixture of mineral salts and water that is absolutely safe to administer and has no medical effects whatsoever. The likely purpose of these placebo doses is:. . A. for use as treatments in a double blind experiment. . B. for testing as a cure for dehydration. . C. for a test of the Hawthorne effect. . D. for use on a control group in an experiment. . E. for use as placebos. .

Answer 1

Answer: D. for use on a control group in an experiment.

Step-by-step explanation:

A control group is the group in an experimental study that does not receive any treatment like other variables used in an experiment. It is used as a benchmark or standard of the experiment for comparing the change occurring in other variables.

As it is mentioned that a number of placebos are prepared and has no medical effects then it is can be used as a controlled group of the experiment.

Answer 2

Placebo-controlled studies is one of the ways testing a medical research in which, in addition to a group of subjects that receives the treatment to be evaluated, a separate control group receives a sham "placebo" treatment which is specifically designed to have no real effect. So, the answer for this question is letter D. Those placebo doses are for used as a control group in an experiment.