Final answer:
The mother withdrawing her child from the study is exercising the right to self-determination. This right allows patients or their guardians to make informed decisions about participation in clinical research at any time.
Step-by-step explanation:
By withdrawing her child from the research study which uses high-dose steroids, the mother is exercising the right to self-determination. This right is part of the ethical principle of autonomy in a clinical setting, allowing patients to make informed decisions regarding their own or their child's healthcare. In this scenario, the mother has the right to withdraw her child despite assurances of safety, because she maintains authority over medical decisions for her child. In clinical trials, it's crucial that participants, or parents of child participants, are able to exercise this right at any time.
Other rights involved in clinical research include the right to not be harmed, the right to full disclosure, and the right of confidentiality. However, in this case, the act of withdrawing from the study is primarily an exercise of the right to self-determination. Researchers must respect this decision and ensure the participant's data remains confidential.