<p>An MP is a Member of Parliament and sits in the House of Common, something akin to a member of the House of Representatives in the US.</p>
<p>When Dr. Marshall used the term psychopath, she was not talking about anti social traits or disorders as defined by DSM-VI. She was not using the American definition at all.</p>
<p>To put it simply, a psychopath as defined in the PCL-R, is revealed not by his behaviors but by his personality traits. While most psychopaths fit the definition of APD, most folks with APD are not psychopaths.</p>
<p>This article should help to clarify the differences.</p>
<p>[Psychopathy</a> and Antisocial Personality Disorder: A Case of Diagnostic Confusion - Psychiatric Times](<a href=“http://www.psychiatrictimes.com/display/article/10168/54831]Psychopathy”>http://www.psychiatrictimes.com/display/article/10168/54831)</p>
<p>What we have here are two different instruments that assess two different populations that share some common traits.</p>