A researcher does NOT need to seek informed consent from the participant if doing so will decrease the internal validity of the experiment.

Question

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Informed consent is an ethical requirement for conducting research with human participants. It is important to ensure that participants are fully informed about the purpose of the study, the procedures involved, potential risks and benefits, confidentiality, and their right to withdraw at any time. While some exceptions to informed consent may occur under certain circumstances, such as when it is impossible to obtain consent, it is generally not acceptable to forego informed consent purely for the sake of experimental design or internal validity. Researchers have a responsibility to weigh the potential benefits of their research against the potential harm or discomfort to participants and to obtain informed consent whenever possible.

A Researcher Does NOT Need to Seek Informed Consent from the Participant