The signs and symptoms of psychopathy are identified most commonly in scientific studies by Hare’s 20-item Psychopathy Checklist-Revised. This checklist identifies the following as the symptoms and signs of psychopathy:
- Superficial charm and glibness
- Inflated sense of self-worth
- Constant need for stimulation
- Lying pathologically
- Conning others; being manipulative
- Lack of remorse or guilt
- Shallow emotions
- Callousness; lack of empathy
- Using others (a parasitic lifestyle)
- Poor control over behavior
- Promiscuous sexual behavior
- Behavioral problems early in life
- Lack of realistic, long-term goals
- Being impulsive
- Being irresponsible
- Blaming others and refusing to accept responsibility
- Having several marital relationships
- Delinquency when young
- Revocation of conditional release
- Criminal acts in several realms (criminal versatility)
