MBTI Certification Flaws
The standards set for MBTI certification are set by the vending company, in EXACTLY the same way that the standards might be set by Langevin — they get to choose.
The requirements to administer the MBTI are not nearly high enough to qualify anyone to use a psychometric test of any kind, even the MBTI, because they simply don’t require enough psychometric knowledge in general to allow the proper use of the MBTI (sorry, I know this will offend some, but if you are qualified in psychmetrics as a field, you’ll understand). Hence there are a lot of MBTI certified people who shouldn’t be a allowed near ANY psychometric instrument, including the MBTI. MOST (and I stand on this statement) certified MBTI folks simply lack the broad knowledge and depth of knowledge to administer and interpret the results properly.
There ARE psychometric instruments where the standards for certification require a much broader and deeper understanding of psychometrics (i.e. disciplined and demonstrated graduate study and practicuums). Those standards are not set by the manufacturers of the test, and usually an advanced relevant degree (usually in Psychology) is required. Some intelligence tests, and the MMPI are examples.
So, sorry on this one, but WHENEVER the vendor sets the criteria (which is the case for the MBTI or “Robert’s Inventory of Critical Thinking Skills”, the problem is exactly the same.
If the standards aren’t set by an independent party, they should ALWAYS be suspect. When the standards are set by a party with an economic interest in selling instruments, it’s a major problem.