Questions below will be bases on the following study: A researcher wishes to test whether the drug, magnesium pemoline, has any influence on intelligence. Two groups of subjects are randomly selected from the population of Omega University students. Group A is given the magnesium pemoline and then tested on the Stanford-Binet IQ test. Group B is given a placebo and, then, also tested on the Stanford-Binet. Both groups are tested under identical environmental conditions.
-The group which received the placebo is called
A) the experimental group
B) the control group
C) the matched group
D) the model group

Question

Quizplus · Accepted Answer

The group which received the placebo is called the control group. In experimental studies, the control group is used to provide a baseline for comparison with the experimental group (the group receiving the treatment or intervention being tested). The control group helps to isolate the effect of the treatment by ruling out alternative explanations for any changes observed. In this study, the control group received a placebo, which is an inactive substance, and was tested under the same conditions as the experimental group that received magnesium pemoline.

Questions Below Will Be Bases on the Following Study: a Researcher