The question Is there a relationship between caffeine intake and intraocular pressure in patients with glaucoma? is an example of which type of research?
a. Basic
b. Correlational
c. Historical
d. Phenomenological
Question 2
In which type of research is there high researcher control, random sampling, and controlled setting?
a. Descriptive
b. Correlational
c. Experimental
d. Quasi-experimental