James reads a magazine ad about a drug that doctors say may help college students perform better on multiple-choice type tests. Being the inquisitive person that he is, James decides to do an experiment to see if the magazine's claims are true. He administers the drug to one of his classes, and gives the other class a placebo. James then tests the students in both groups on material they have recently discussed in class. In this example, the experimental group is the ____.
a. students who received the drug
b. students who received the placebo
c. test performance of the students
d. age of the students
Question 2
Dr. Noyd conducts an experiment to determine whether talking to a psychiatrist makes depressed people less depressed. He randomly divides participants who scored highly on a depressive inventory into two groups.Group A discusses their problems with a psychiatrist while Group B does nothing.He finds that Group A shows significantly more improvement in their depression than does Group B. In Dr. Noyd's experiment, the experimental group refers to the ____.
a. differences observed whether or not therapy was received
b. individuals who discuss their problems
c. scores on the depressive inventory
d. random assignment
Subcutaneous drug administration: (a) cross section of skin showing depth of needle insertion;
Students in class
Computerized tomography (CT) is used to perform a brain scan.
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