@jacint61 wrote:
Sorry if someone is disagree with me but a black box can be manipulable and be designed to be harder or easier throwing more difficult and tricky questions , or miscalculating the amount of right answers that could compensate the wrong answers. Just my opinion.
Not going to disagree at all. You have just described the art of test-development. Every teacher knows how to write a test that everyone will fail or that everyone will pass. The trick is to adjust the difficulty of questions so that the grades have a normal distribution.
... there is no way to request a verification of the test including the kind of questions generated according to the algorithm and the candidate. Is there any previous setup for specific candidate, is it fair for every candidate?
(ISC)² does announce how many questions you will get from each domain and provides some information on how the grading works.
There is no need to request a verification because one is automatically performed after every exam. This is why the results provided at the end of the exam (at least if one passes) are termed "preliminary" and formal notification comes a few days later, once the "Psychometric Analysis" has been completed.
Beyond just analyzing if you were given a fair test and took it fairly, it also analyzes if the questions are performing as well as expected. Over time, bad questions (ones regularly answered wrong by those who pass) are removed from the test bank. So, continuous improvement is at work.
It looked to me without any bad intention in saying this, that explainability, trust and transparency should be incorporated in the process when candidates fail the test. They want to know the why in details.
There is a balance between helping you understand what you got wrong and protecting exam confidentiality. Back in "the day", one only received a pass/fail notification. Disclosing how well one did in each domain and putting them in order from best to worst was added to better advise on where one needed to study without risking the test-bank itself becoming public knowledge.
@jacint61 wrote:
My perception is that I responded more than 80 % of the questions correctly in the exam.
Google "The Stages of Learning". It is common for those in the "UI" stage to overestimate their ability and to blame the exam when they fail. As one progresses to the "UC" stage, one tends to say "I get lucky".
It is definitely possible to pass. There are a lot of people taking these exams and a lot of people passing them. In a little under a year, 15,000 people have earned the CC. It is administered by PersonVue, a company that specializes in annually delivering 19 million exams for about 650 different companies. At these scales, if there were inbuilt "unfairness", it would come out in the statistics and the reputation.
