Attention Deficit Disorder Prosthetic Memory Program

Macdonald Triad

ADDPMP504
Macdonald Triad - © Attention Deficit Disorder Prosthetic Memory Program

The Macdonald triad (also known as the triad of sociopathy or the homicidal triad) is a set of three factors, the presence of any two of which are considered to be predictive of, or associated with, violent tendencies, particularly with relation to serial offenses. The triad was first proposed by psychiatrist J. M. Macdonald in “The Threat to Kill”, a 1963 article in the American Journal of Psychiatry. Small-scale studies conducted by psychiatrists Daniel Hellman and Nathan Blackman, and then FBI agents John E. Douglas and Robert K. Ressler along with Dr. Ann Burgess, claimed substantial evidence for the association of these childhood patterns with later predatory behavior. Although it remains an influential and widely taught theory, subsequent research has generally not validated this line of thinking.

The triad links cruelty to animals, obsession with fire-setting, and persistent bedwetting past a certain age, to violent behaviors, particularly homicidal behavior and sexually predatory behavior. However, other studies claim to have not found statistically significant links between the triad and violent offenders.

Further studies have suggested that these behaviors are actually more linked to childhood experience of parental neglect, brutality or abuse. Some argue this in turn results in “homicidal proneness”. The “triad” concept as a particular combination of behaviors linked to violence may not have any particular validity – it has been called an urban legend.

Organisms Named After Famous People - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP424
Organisms Named After Famous People
We Can't Be Stopped Album Cover - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP140
We Can't Be Stopped Album Cover
Bizarre Stock Photos - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP227
Bizarre Stock Photos
Flamethrower - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP274
Flamethrower
Optical Camouflage - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP105
Optical Camouflage
Transocean Winner - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP249
Transocean Winner
Cadillac Ranch - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP129
Cadillac Ranch
Autumn Evening - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP384
Autumn Evening
Spaghettification - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP489
Spaghettification
Hannibal Lecter’s Memory Palace - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP012
Hannibal Lecter’s Memory Palace
Cortinarius Violaceus - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP439
Cortinarius Violaceus
Miracle Lone Pine Tree - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP167
Miracle Lone Pine Tree

You are using an outdated browser.
Please upgrade your browser to improve your experience.