Final answer:
The principle from the Belmont Report that supports the belief in having research study participants represent those who would benefit from the findings is the principle of justice. This ensures equitable treatment and fair selection of participants, reflecting the distribution of benefits and burdens of research.
Step-by-step explanation:
The belief that the participants in a research study should be representative of the type of people who would also benefit from the findings of the research aligns with the principle of justice from the Belmont Report. This principle maintains that the distribution and practice of health care should be impartially applied to ensure equity. In the context of research involving human participants, this principle ensures that all participants are treated fairly and that the selection of subjects is equitable, thus preventing any exploitation of particular groups for the benefit of others.
Justice in clinical trials requires that the benefits and burdens of research are distributed equally among all groups in society, reflecting the ideal that similar cases should be treated equivalently. It implies that scientists and researchers should be careful not to select subjects based on convenience or because of manipulability, but rather based on the relevance to the population that would benefit from the research findings. Therefore, capturing a diverse and representative sample upholds the principle of justice and ensures the ethical soundness of the research study.