A characteristic of an experiment is that
A) both the dependent variable and the independent variable must be dichotomous.
B) the independent variable must be dichotomous and the dependent variable continuous.
C) the dependent variable must be presented at a minimum of two levels.
D) the independent variable must be presented at a minimum of two levels.
Question 2
The independent variable must vary from one condition to another in a(n)
A) pretest manipulation control.
B) experiment.
C) manipulated posttest control experiment.
D) pretest manipulation experiment.