Informed consent is documented by means of a written, signed, and dated informed consent form. Nowadays, medical research is overseen by an ethics committee that also oversees the informed consent process. As the medical guidelines established in the Nuremberg Code were imported into the ethical guidelines for the social sciencesinformed consent became a common part of the research procedure. Here, research often involves low or no risk for participants, unlike in many medical experiments.
Second, the mere knowledge that they participate in a study can cause people to alter their behavior, as in the Hawthorne Effect : "In the typical lab experiment, subjects enter an environment in which they are keenly aware that their behavior is being monitored, recorded, and subsequently scrutinized.
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