The classical experimental design contains all of the following, EXCEPT
A) pretest and posttest measures.
B) random assignment of subjects.
C) an experimental and control group.
D) at least two different independent variables.

Question

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Classical experimental design typically involves a pretest and posttest, random assignment of subjects, and an experimental and control group, but it does not require at least two different independent variables. It often focuses on the effect of a single independent variable on a dependent variable.

The Classical Experimental Design Contains All of the Following, EXCEPT