The purpose of randomization is to make sure that
A) each research participant spends an equal amount of time in the treatment and control groups.
B) each research participant has an equal chance of being in the treatment or control group.
C) everyone in each group is exactly the same on the independent variable.
D) everyone in each group is exactly the same on the dependent variable.

Question

Quizplus · Accepted Answer

Randomization ensures that each participant has an equal chance of being assigned to the treatment or control group, which reduces the influence of extraneous variables and increases the internal validity of the study. Choices A, C, and D are incorrect because randomization does not ensure equal time spent in the treatment and control groups, nor does it ensure that everyone is exactly the same on the independent or dependent variables.

The Purpose of Randomization Is to Make Sure That