1. Superficial charm and good “intelligence”
2. Absence of delusions and other signs of irrational thinking
3. Absence of nervousness or psychoneurotic manifestations
4. Unreliability
5. Untruthfulness and insincerity
6. Lack of remorse and shame
7. Inadequately motivated antisocial behavior
8. Poor judgment and failure to learn by experience
9. Pathologic egocentricity and incapacity for love
10. General poverty in major affective reactions
11. Specific loss of insight
12. Unresponsiveness in general interpersonal relations
13. Fantastic and uninviting behavior with drink and sometimes without
14. Suicide threats rarely carried out
15. Sex life impersonal, trivial, and poorly integrated
16. Failure to follow any life plan

From The Mask of Sanity: An Attempt to Clarify Some Issues About the So Called Psychopathic Personality by Dr. Hervey M. Cleckley.