Jennifer reviewed the literature on research related to patients with anxiety disorders in clinical psychology. She designs a study assigning some patients to three different treatments and a control group with no treatment. She then measures anxiety symptoms 2 months after the treatment.
How many levels are there for the independent variable?
A) 2
B) 3
C) 4
D) 5

Question

Quizplus · Accepted Answer

The independent variable, which is the type of treatment, has four levels: three different treatments plus a control group with no treatment.

Jennifer Reviewed the Literature on Research Related to Patients with Anxiety