Changes in the healthcare environment are putting increasing pressure on me
dical schools to make faculty accountable and to document the quality of th
e medical education they provide. Faculty's ratings of students' performanc
es and students' ratings of faculty's teaching are important elements in th
ese efforts to document educational quality. This article discusses selecte
d research related to factors affecting raters' judgements, analyses how ch
anges in the health care environment are influencing such judgements, offer
s some suggestions to moderate some of the effects and links these influenc
es to the system that upholds professional standards. Ratings are known to
have a positive bias (generosity error), provide limited discrimination and
often fail to document serious deficits. The potential sources of these pr
oblems relate to the mechanics of the rating task, the system used to obtai
n ratings and factors affecting rater judgement. As managed care demands re
duce the time faculty have for teaching, as system-wide disincentives to pr
ovide negative ratings proliferate and as social engineering challenges, su
ch as the Americans with Disabilities Act, impose differential standards fo
r students, the natural tendency to avoid giving negative ratings becomes e
ven harder to resist. Ultimately, these forces compromise the capability of
faculty to uphold the standards of the profession. The author calls for a
national effort to stem the erosion of those standards.