You, sir, have no basis whatsoever to state my qualifications or lack thereof. You might note, if you want to be correct, that Dr. is ascribable correctly to anyone who has earned a doctoral degree, including even MD's.
You, if you want to know more, might check the current practices that have supplanted the GAF among current qualified practitioners.
It would also probably be beneficial form you to learn more about the roel of neurological testing and psychological testing. Present practice never uses such imprecise and subjective testing as the GAF independently, Neuorological functions are now often diagnoses by means of one of the several available modern scanning techniques. When GAF was popular MRI, for instance, did not exist.
Since you are apparently not familiar with neurological advances nor current psychological practices you might benefit from a bit of study.
Specifically the advent of MRI understanding of neurology has advanced immeasurably. one current focus has been with degenerative disease such as Alzheimers. Mayo Clinic publishes some useful references :
Alzheimer's Disease Evaluation [A Test in Focus] - Insights
Finally, Narcissitic Personality Disorder is recognized by social interactions and socially defined cues. Generally that is applied in a psychological context without reference to neurological factors. Mayo Clinic again describes that:
Narcissistic personality disorder - Symptoms and causes
Finally, you assume without any basis what another person may possess in qualifications. That, sir, is a practice both arrogant and ignorant.
Prudent and wise people tend to discover the qualifications of people they choose to disdain prior to choosing that practice, rather than after.
It is quite common for people who possess some paper qualification or other to condescend to others they suspect might not have their 'superior' education, which they tend often to perceive as intellectual deficiency. That is quite understandable for people who are not secure in their own competence.
Odd, is it not, that those characteristics are commonly associated with Narcissistic Personality Disorder.
