Which one of the following represents a critical difference between the non-experimental and experimental methods?
A) Non-experimental methods involve operational definitions while experimental methods do not.
B) Experimental methods involve operational definitions while non-experimental methods do not.
C) Non-experimental methods involve the manipulation of variables while experimental methods do not.
D) Experimental methods involve the manipulation of variables while non-experimental methods do not.

Question

Quizplus · Accepted Answer

The critical difference between non-experimental and experimental methods is that experimental methods involve manipulation of variables, while non-experimental methods do not. In non-experimental methods, the variables are observed or measured without manipulating them, while in experimental methods, one variable is manipulated to observe its effect on another variable. Operational definitions could be used in both types of methods.

Which One of the Following Represents a Critical Difference Between