I have already studied the exams in question and this is not the case. And this has never been the case in any exam I have studied. When the scores drop below 70% the students are already missing the majority questions to which partial credit can even be applied. When the scores drop below 50% the students are missing practically all of the questions to which partial credit applies. For example, a student scoring a 3 on the AP calculus exam leaves most of the FR section blank and those portions they don't leave blank are mostly wrong. They eek out the 35% from the lowest level questions on the test and guessing, they don't even make it to partial credit questions.
On Feb 6, 2012, at 11:46 AM, Paul Tanner <email@example.com> wrote:
> Now I reiterate another post of mine in this thread, > http://mathforum.org/kb/message.jspa?messageID=7661427&tstart=0 > where I prove that you are just refusing to deal with the truth that a > 35% score with no partial credit can very easily be equivalent to a > 60% or even a 70% with partial credit and/or grading on a curve,