Why is random assignment used in between-subjects experimental designs?
A) To hold participant characteristics constant
B) To ensure a nonbiased sample
C) To ensure anonymity of the research participants
D) To eliminate systematic differences between the groups

Question

Quizplus · Accepted Answer

Random assignment is used in between-subjects experimental designs to eliminate systematic differences between the groups. This helps ensure that any differences observed between the groups are due to the independent variable being manipulated, rather than pre-existing differences between the participants.

Why Is Random Assignment Used in Between-Subjects Experimental Designs