This is really the key part of the study ^((and why I subscribed thru email for the release of the article)). Most people nowadays think that people with Narcissistic Personality Disorder (NPD) do not have empathy.

Research, however, proves otherwise. Affective aspects of empathy (involved in sharing emotions of others, and responding appropriately to others) show impairment, while cognitive empathy (understanding thought processes of others) appears preserved. People with NPD can understand why people act a certain way, and they theoretically use that knowledge to cover up their internal suffering - outwardly seen as being manipulative and having grandiose sense of self.