%X Bioethics guidelines vary in their response to children as research subjects. Children have been ignored or intensely discussed, carefully protected or exposed to high risk research, regarded as the last or as the first group to take part in research. This article traces the changing position of children in successive bioethics guidelines. %J Bulletin of Medical Ethics %A P Alderson %O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %L discovery1493940 %C England %D 1999 %T Did Children Change, or the Guidelines? %N 150 %P 38-44