Dr Smith Is Developing a New Drug to Treat Headaches

Multiple Choice

Dr. Smith is developing a new drug to treat headaches. To test this drug, she develops a study in which one group gets the new drug, and the other gets a placebo, or a fake pill. Dr. Smith measures whether headaches improve by giving each participant a survey each day. The amount of improvement, as measured by the survey, is the ______ variable.

A) independent
B) dependent
C) non-response
D) explanatory