Informed consent is central to modern research ethics. Informed consent procedures have mainly been justified in terms of respect for autonomy, the core idea being that it should be every competent individual's right to decide for herself whether or not to participate in scientific studies. A number of conditions are normally raised with regard to morally valid informed consent. These include that potential research subjects get adequate information, understand those aspects that are relevant to them, and, based on that information, make a voluntary decision whether or not to participate. These conditions are meant to guarantee that participation is genuinely the individual's own choice and is coherent with his or her authentic interests.