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

Multiple Choice

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 design of this study is an example of

A) the between-subjects method
B) the before-after method
C) the matched-subjects method
D) the repeated measures method