Random assignment to either the control or experimental group is an important aspect of experimental procedures.Random assignment is used to ensure that:

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Random assignment helps to ensure that participants in the experimental and control groups are as similar as possible in terms of any potential confounding variables, such as age, gender, personality traits, etc. This makes it more likely that any differences observed between the two groups can be attributed to the manipulation of the independent variable, rather than other individual differences between participants.

Random Assignment to Either the Control or Experimental Group Is