Key points are not available for this paper at this time.
Mary Cipriano Silva, Jeanne Merckle Sorrell, Enhancing Comprehension of Information for Informed Consent: A Review of Empirical Research, IRB: Ethics & Human Research, Vol. 10, No. 1 (Jan. - Feb., 1988), pp. 1-5
Silva et al. (Fri,) studied this question.