Personal autonomy and informed consent.

Two ways of understanding the notion of autonomy are outlined and discussed in this article, in order to clarify how and if informed consent requirements in biotechnological research are to be justified by the promotion of personal autonomy: A proceduralist conception linking autonomy with authenticity, and a substantivist conception linking autonomy with control. The importance of distinguishing autonomy from liberty is emphasised, which opens for a possible conflict between respecting the freedom and the autonomy of research participants. It is argued that this has implications for how consent requirements based on different criteria of specificity and understanding should be viewed and justified.