Thank you for posting that information Hend. We plan to send a survey to our paying customers whom took the exam in 2011 and look forward to comparing our rate with GARPS as far as a passing rate of bionicturtle.com customers.
Re: why it is important? I happen to agree with your soft suggestion (if you meant as such) that the pass rate is NOT very informative. For many standardized exams, pass rate can be viewed as gauge the relative degree of difficulty. However, as GARPs method is basically a sophisticated "grading on a curve" (i.e., the pass rate is a function of where they set the ratio to the top 5 percentile), the pass rate clearly (IMO) cannot be a pure gauge of relative difficulty. Their method allows them to dampen/drop the absolute pass score if the exam is empirically, ex post, found to be more difficult than intended. In this way, I perceive there to be a component of intentional smoothing (caveat: this is 100% my own interpretation). For example, these recent rates somewhat fit the into an emergent trend (caveat again: there is not much of a history for P1 & P2) that i might loosely summarize as:
P1 pass rate less than 50%, in the 45 to 50% range
there can be a good debate about pros/cons, i personally think their approach here is smart (cynics can say it ensure an 40% repeat buyer base; optimists who pass can say "GARP is keeping the standard high"). For what it's worth, David
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