Macdonald triad by John Marshall Macdonald

Macdonald triad (triad of sociopathy) is a set of three behavioral characteristics associated with sociopathic behavior
It was first identified by J.M. Macdonald in 1963 and published in the American Journal of Psychiatry
Macdonald triad is formed by:
- Animal cruelty
- Obsession with fire setting
- Persistent bedwetting past the age of five
It is linked to violent behavior, particularly homicidal behavior

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