Understanding Narcissistic Personality Disorder: Diagnosis and Self-Assessment”
Narcissistic Personality Disorder (NPD) is incredibly difficult to diagnose in general. For starters, you need to have a willing participant who will accept the assessment process to fully quantify whether someone is truly narcissistic in nature. Even then, they are masters at deviating from the truth, so they are very likely to try to influence psychometric tests to suit their needs.
If you want to test yourself, here is the most commonly used psychometric test to diagnose NPD. You might be surprised at what appears in the results section.
I’ve included mine below, which I found interesting myself. I was especially interested in taking the time to see if the questions actually fit me, as there were many that took more time to see which ones fit me now compared to if it was my younger self answering the questions.