Dr. Hyper treated 20 patients using a new therapeutic procedure. An outside observer rated the children's activity level on a laboratory task before and after the treatment; 80% of the children decreased their activity level following treatment, and Dr. Hyper concluded that the procedure was highly effective. In Dr. Hyper's experiment, what is the independent variable?
A)The children's diagnosis as hyperactive or not
B)The presence of the observer
C)The new therapeutic procedure
D)The children's activity level

Question

Quizplus · Accepted Answer

The independent variable is the variable that is manipulated or changed in the experiment, and in this case, it is the new therapeutic procedure that Dr. Hyper is testing. The other options (children's diagnosis, presence of the observer, and children's activity level) are either irrelevant or dependent variables in this experiment.

Dr Hyper Treated 20 Patients Using a New Therapeutic Procedure