The reason researchers use random assignment in an experiment is
A)to ensure group equivalence.
B)to be fair to the participants.
C)because it's what the textbook tells them to do.
D)a fake,because they don't really use random assignment.

Question

Quizplus · Accepted Answer

Random assignment is used to ensure group equivalence, which means that participants in each group have a similar distribution of characteristics and attributes. This is important in order to reduce the influence of extraneous variables on the dependent variable being studied. By randomly assigning participants to groups, researchers can assume that any differences observed between the groups are due to the independent variable being tested and not to pre-existing differences between the groups.

The Reason Researchers Use Random Assignment in an Experiment Is