Multiple Groups A researcher's decision to use more than two levels of the independent variable in an experiment mainly depends on
A)the dependent variable.
B)the estimated effect size.
C)the research hypothesis.
D)whether subjects will be run in more than one treatment condition.

Question

Quizplus · Accepted Answer

The researcher's decision to use more than two levels of the independent variable in an experiment mainly depends on the research hypothesis. The researcher needs to determine whether the research hypothesis requires more than two levels of the independent variable in order to adequately test the hypothesis. The dependent variable and estimated effect size may also play a role in this decision, but the research hypothesis should be the primary consideration. The fact that subjects may be run in more than one treatment condition is not necessarily a determining factor in the decision to use more than two levels of the independent variable.

Multiple Groups a Researcher's Decision to Use More Than Two