Experimenters use random assignment of participants to different groups in order to:
A) increase the likelihood that the participants in each group knew one another.
B) increase the likelihood that participants within a group were similar to one another.
C) reduce the likelihood of any preexisting differences between groups.
D) ensure that each groups had the same number of participants.

Question

Quizplus · Accepted Answer

Random assignment helps ensure that any preexisting differences between groups are evenly distributed, which allows for more accurate comparisons between groups.

Experimenters Use Random Assignment of Participants to Different Groups in Order