What I am saying is that you probably do not realize you are doing it, but if you have an expectation of hitting a particular curve (and please don't try to tell me that there is no page somewhere outlining what are the expected percentages at various performance levels...) then you will bias yourself towards hitting that curve. You will not realize it, but you will do it anyway.

This usually happens at calibration and not initial assessment, but I am quite certain that it _does_ happen because the numbers do not lie.