Believe It or not, this is a quote from an email conversation I had with “someone” from the ABPath:
“Each score is a scaled score; therefore, one point does not correspond to one question correct or incorrect. Your scaled score, in addition reflecting the number of questions you got right or wrong, also depends on the difficulty of the questions that were answered right or wrong. This means that only computerized scoring can calculate correct scaled scores. ”
I yes, I agree, that does seem relatively contradictory to what is posted on the ABPath website.