Which practices are essential when obtaining consent from individuals in special populations with potentially limited decision-making capacity?

• A. Obtain assent when appropriate, and involve guardians only if required.
• B. Exclude guardians from the process to simplify research.
• C. Assess cognitive ability, provide understandable information, obtain assent when appropriate, and involve guardians as required.
• D. Assume capacity based on age alone.

Answer: (C)

When obtaining consent from individuals in populations with potentially limited decision-making capacity, the essential practice is to assess cognitive ability, present information in an understandable way, obtain assent when appropriate, and involve guardians as required. This approach ensures the person’s autonomy is respected to the extent possible by confirming they understand what participation involves and can agree to it. If someone cannot provide full informed consent, a guardian or surrogate is involved to protect their interests and provide permission on their behalf. Presenting information in clear, accessible language and checking understanding prevents miscommunication and helps ensure that participation is voluntary rather than coerced. Involving guardians as required follows ethical and often regulatory guidelines to safeguard those who cannot fully decide for themselves. Excluding guardians or assuming capacity based on age oversimplifies capacity and can put vulnerable individuals at risk, since deciding capacity is a process, not a blanket attribute.