Attrition effects are automatically controlled when participants are assigned randomly to experimental and control groups.

Question

Attrition effects are automatically controlled when participants are assigned randomly to experimental and control groups.​

Quizplus · Accepted Answer

Random assignment helps to ensure that groups are equivalent at the start of the experiment, but it does not control for attrition effects (loss of participants) that occur after the experiment begins. Attrition can still introduce bias if the reasons for dropout differ systematically between the groups.

Attrition Effects Are Automatically Controlled When Participants Are Assigned Randomly