Key points are not available for this paper at this time.
Greg A. Sachs, Gavin W. Hougham, Jeremy Sugarman, Patricia Agre, Marion E. Broome, Gail Geller, Nancy Kass, Eric Kodish, Jim Mintz, Laura W. Roberts, Pamela Sankar, Laura A. Siminoff, James Sorenson, Anita Weiss, Conducting Empirical Research on Informed Consent: Challenges and Questions, IRB: Ethics & Human Research, Vol. 25, No. 5, Supplement (Sep. - Oct., 2003), pp. S4-S10
Sachs et al. (Mon,) studied this question.