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How many members must sit on an Institutional Review Board (IRB)?

  1. 3

  2. 5

  3. 7

  4. 9

The correct answer is: 5

An Institutional Review Board (IRB) is a committee responsible for reviewing and approving research studies involving human subjects. These boards are typically composed of a diverse group of individuals, including scientists, ethicists, and community members, with the goal of ensuring that research is conducted ethically and in accordance with regulatory guidelines. While there is no set number of members required on an IRB, most institutions utilize a board of five members to ensure a well-rounded and thorough review process. Any more or less than five members may result in an unbalanced review or insufficient representation of important perspectives. Therefore, five members is the most appropriate and commonly used number for an IRB.