Use the Guidelines to Evaluate the Study

Multiple Choice

Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?
-A pharmaceutical company conducted a study to test the effectiveness of its new anti-depression medication. 500 adults suffering from depression were selected at random and were randomly
Assigned to either a treatment group or a placebo group. The experiment was double blind. The
Results were analyzed by the company.

A) Selection bias
B) The setting may not encourage honest responses
C) The source of the study
D) Confounding variables
E) Variables are difficult to define/measure