Why Is Random Assignment Important in an Experiment

question 144

Multiple Choice

Why is random assignment important in an experiment?

• A) It assures that all participants take part in all conditions of a study.
• B) It allows researchers to rule out individual differences as an alternative explanation.
• C) It ensures that all participants see the same manipulation of the independent variable.
• D) It is an index of the probability that experimental results occurred by chance.

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