Which of the following supports the ethical principle of autonomy in research studies?

Informed consent from all participants is a fundamental aspect that supports the ethical principle of autonomy in research studies. Autonomy refers to the right of individuals to make informed decisions about their participation in research. By ensuring that participants receive comprehensive information about the study, including its purpose, procedures, potential risks, and benefits, researchers empower individuals to voluntarily choose whether or not to participate. This process underscores respect for personal decision-making and ensures that individuals are not coerced or misled about the nature of the research.

In contrast, mandatory participation undermines autonomy by removing the choice from individuals. Exempting the disclosure of risks does not respect participants' rights to know what they are engaging in, and using deception in recruitment can violate the trust necessary for informed decision-making. Thus, informed consent is essential for honoring participants' autonomy and ensuring ethical standards are maintained in research practices.