A problem with designing an experiment with only two levels of the independent variable is
A) only one dependent variable can be used with this design.
B) it will only indicate a linear relationship between the independent variable and the dependent variable.
C) this design is more susceptible to confounds than other designs.
D) the results cannot be generalized.

Question

Quizplus · Accepted Answer

Having only two levels of the independent variable will limit the ability to detect non-linear relationships between the independent variable and the dependent variable. A design with more levels allows for testing of curvilinear relationships. However, B is not the only limitation of this design, as it may also increase the potential for confounding variables. Therefore, choice C can also be a valid answer.

A Problem with Designing an Experiment with Only Two Levels