A researcher wants to determine the cause of intoxication.On successive days, he consumed large quantities of scotch and water, bourbon and water, and vodka and water.Becoming very intoxicated in each case, he concluded, "It's the water that makes one drunk." The researcher should have consumed pure water on one of his test days.The water alone test would be called a
A) double blind.
B) hypothesis.
C) prediction.
D) control.

Question

Quizplus · Accepted Answer

The researcher should have consumed pure water on one of his test days to establish a control group. A control group is necessary to compare the results of the experimental groups and determine whether the water alone caused the intoxication or if it was the combination of alcohol and water. Therefore, the correct answer is D, control. A double-blind is a method used in experiments, a hypothesis is an educated guess, and a prediction is an estimation of what will happen based on prior knowledge. None of these options are applicable in this scenario.

A Researcher Wants to Determine the Cause of Intoxication