The practice of assigning subjects to treatments or control groups in a completely random manner is

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Randomization is the practice of assigning subjects to treatments or control groups in a completely random manner. This helps to ensure that any observed differences between the groups are due to the treatment itself rather than any other factors, such as pre-existing differences between the subjects. Blinding and double-blinding refer to procedures for reducing bias in the study, while cohorting refers to grouping subjects based on a shared characteristic, such as age or gender.

The Practice of Assigning Subjects to Treatments or Control Groups