A psychiatrist is interested in determining if conditions of individuals who are clinically depressed improve with either 20 or 40 milligrams of Prozac.She administers 20 milligrams to a random half of her clients and 40 milligrams to the other half.After six months,she finds that the clients who took 40 milligrams of Prozac are significantly less depressed than those clients who took 20 milligrams of Prozac.Which type of study did the psychiatrist conduct?
A)correlational research
B)experimental research
C)controlled research
D)hypothetical research

Question

Quizplus · Accepted Answer

The study conducted by the psychiatrist was experimental research because she manipulated the independent variable (dosage of Prozac) and measured the dependent variable (level of depression) to determine if there was a significant difference. The random assignment of participants to the two dosage groups also supports the experimental design.

A Psychiatrist Is Interested in Determining If Conditions of Individuals