Researchers' assignment of participants to groups by chance in order to reduce the likelihood that an experiment's results will be due to preexisting differences between groups is known as _____ assignment.

Question

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Random assignment is the process of assigning participants to experimental groups in a random manner. This helps to ensure that group differences are due to the manipulation of the independent variable, rather than preexisting differences between the groups. The other options (correlative, meta-analytical, and replicative) do not accurately describe this process.

Researchers' Assignment of Participants to Groups by Chance in Order