Answer:
between-subjects design
Explanation:
According to my research on different experimental designs, I can say that based on the information provided within the question the best way to make sure that the internal validity will not be influenced by an outside event is to switch to a between-subjects design. This type of design is an experiment design that has two or more groups of subjects each being tested by a different testing factor simultaneously. Since they are done simultaneously it significantly reduces outside influence.
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To enter correct codes is necessary for the medical or healthcare facility's financial stability. It is important that the patient's insurance information, dates of birth and addresses are correctly recorded for billing. It allows for the hospital to bill the patient for the right services offered and at the right time. In the absence of this, it will cost the medical facility both time and money not only for a cleanup but also for the eventual loss of revenue for the Hospital.