John Macdonald (psychiatrist)
Encyclopedia
John Marshall Macdonald was a forensic psychiatrist most renowned for his discovery of the Macdonald triad
of sociopathic
traits and his profiling of serial killer
s. He published approximately a dozen books in his field.
Macdonald triad
The Macdonald triad is a set of three behavioral characteristics that are associated with sociopathic behavior. The triad was first identified by J.M...
of sociopathic
Psychopathy
Psychopathy is a mental disorder characterized primarily by a lack of empathy and remorse, shallow emotions, egocentricity, and deceptiveness. Psychopaths are highly prone to antisocial behavior and abusive treatment of others, and are very disproportionately responsible for violent crime...
traits and his profiling of serial killer
Serial killer
A serial killer, as typically defined, is an individual who has murdered three or more people over a period of more than a month, with down time between the murders, and whose motivation for killing is usually based on psychological gratification...
s. He published approximately a dozen books in his field.