Why Do Researchers Use Random Assignment in an Experiment

question 41

Multiple Choice

Why do researchers use random assignment in an experiment?

• A) to provide ethical reasons for being in an experiment
• B) to prevent subjects from knowing which experimental group they are a member of
• C) to cause a selection factor to determine how the subjects will behave in the experiment
• D) to ensure that no pre-existing differences among groups cause the change in the experimental group's behaviour

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