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Informed consent is the process of letting participants know the relevant aspects of an experiment and what will happen during the study. Participants must understand potential risks and implications before agreeing to participate. An IRB won't approve a study unless it includes informed consent, ensuring participants are aware of their rights and can make voluntary decisions about their involvement.

Researchers may use deception—purposefully misleading experimental subjects—only when necessary to maintain study integrity and prevent participants' knowledge from unnaturally altering results. For example, if studying how classical music affects mood, researchers might tell participants they're measuring music enjoyment instead. However, deception must never be harmful, and participants must receive full debriefing afterward revealing the true purpose and why deception was necessary.

Institutional Review Boards (IRBs) are committees consisting of school and community members responsible for enforcing ethical codes in research. They review research proposals based on ethical guidelines and only approve experiments meeting specific criteria, including informed consent and confidentiality protections. IRBs ensure that participants won't experience excessive physical or psychological harm during studies.

The Tuskegee Syphilis Study violated fundamental ethical principles by failing to inform 600 participants they had syphilis, denying them treatment even after penicillin became available in 1947, and preventing them from seeking outside care. Over 40 years, participants unknowingly spread the disease to their families and died untreated. This egregious violation led directly to the National Research Act of 1974 and modern strict ethical guidelines for human research.

Researchers must guarantee that any personal information participants provide during a study remains completely confidential. This protection is a core requirement in informed consent forms and is enforced by IRBs. Additionally, participants are assured that their involvement is completely voluntary and can be discontinued without penalty at any time.

Debriefing is the process where researchers reveal the true purpose of the experiment, explain why deception was necessary if applicable, and describe potential contributions to society. It must occur at the end of any study involving deception, providing participants with complete, honest information about the study's aims and how their data will be used.

While Institutional Review Boards (IRBs) oversee human research, Institutional Animal Care and Use Committees (IACUCs) review animal research proposals. IACUCs consist of administrators, scientists, veterinarians, and community members charged with ensuring humane treatment of animal subjects. Researchers must design experiments to minimize pain or distress, and IACUCs conduct semi-annual facility inspections to verify compliance with ethical protocols.