What elements must be present in informed consent under TCPS 2?

• A. Clear information, voluntary decision, capacity to consent, understanding, and ongoing consent rights including withdrawal.
• B. Next of kin approves, no capacity requirement.
• C. Consent needs only to sign; no understanding.
• D. Random selection and payment.

Answer: (A)

Informed consent under TCPS 2 rests on five interrelated elements: clear information, voluntary decision-making, capacity to consent, genuine understanding, and ongoing consent with the right to withdraw. Provide information in a way that is appropriate for the participant’s language, literacy, and culture, outlining the purpose, procedures, risks, benefits, privacy protections, and the voluntary nature of participation. The decision to participate must be made freely, without coercion, pressure, or undue influence. The person giving consent must have the capacity to do so—that is, they can understand the information and appreciate the consequences of participating; if someone lacks capacity, appropriate legally authorized representatives or safeguards must be in place. Understanding goes beyond receiving facts; researchers should confirm that the participant truly comprehends what participation entails, using clear language and opportunities to ask questions. Finally, consent is an ongoing process, not a one-time signature: participants should be able to reaffirm or withdraw consent at any point without penalty, and researchers must respect and document any withdrawal. The other options don’t fit because consent is not restricted to a kin’s approval, capacity is essential, signing alone does not ensure understanding, and consent isn’t about random selection or payment.