You would have good reason to believe that the reliability of personality disorders has been improved.
Explanation:
The Reliability of Personality Disorder has been improved as your friend has recently been diagnosed with a personality disorder and the improvement is due to the fact that we have now clear diagnostics criteria and rules.
In past, there was a problem in the diagnosis of personality disorder that's why the reliability was low.
The reliability is important in the diagnosis of the personality disorder.
