Final answer:
Vulnerable populations in research often include historically marginalized communities, and are susceptible to exploitation and coercion, leading to ethical concerns about informed consent and autonomy.
Step-by-step explanation:
Examples of vulnerable populations in research include historically marginalized communities, which have faced exploitation and coercion. Coercion undermines informed consent and personal autonomy, making the exercise of agency impossible.
For instance, when researchers do not adequately explain a trial, misrepresent its goals, or do not ensure that participants fully understand the requirements and risks involved, the integrity of the research is compromised. Vulnerable populations may also include groups defined by behaviors, geographic areas, socioeconomic status, or health conditions. Ethical considerations and the protection of these groups are paramount in research practices.