A problem with designing an experiment with only two levels of the independent variable is that:
A)only one dependent variable can be used with this design.
B)curvilinear relationships between variables cannot be detected.
C)this design is more susceptible to confounds than other designs.
D)the results cannot be generalized.

Question

Quizplus · Accepted Answer

With only two levels of the independent variable, it is impossible to test for curvilinear relationships between the variables. Curvilinear relationships require at least three levels of the independent variable to be tested accurately. However, this design is not necessarily more susceptible to confounds and its results can still be generalized. The use of only one dependent variable is also not necessarily a problem.

A Problem with Designing an Experiment with Only Two Levels