Aggression, testosterone and your finger length!

November 1, 2008

Aggression is likely related to the male hormone testosterone.

Aggression is likely related to the male hormone testosterone.

John Manning wrote in his first book ‘Digit Ratio’:

“Aggression may be viewed as hostile behavior motivated by fear and frustration … There is considerable uncertainty whether testosterone has a causal role in aggression, and other hormones such as cortisol may be equally or more important. In view of this uncertainty it may be instructive to examine whether the 2D:4D ratio or the lenght of the 4th digit adjusted for height are correlated with any forms of aggression including assertiveness, measures of status, verbal aggression, and physical aggression.”

In his first book John Manning presented research which indicates that in both men and women a low digit ratio is frequently accompagnied with: “More aggressive and assertive behaviour”. Since then various studies have confirmed the relationships between aggressive behavior, high levels of testosterone, and a low digit ratio:

An overview of some of the more recent scientific sources which have found a link between finger length and aggressive behavior:

* The presence of aggression cues inverts the relation between digit ratio (2D:4D) and prosocial behaviour in a dictator game. – 2008

* On the relation between 2D:4D and sex-dimorphic personality traits. – 2008

* Finger length ratio (2D:4D) correlates with physical aggression in men but not in women. – 2005

* Digit length ratios predict reactive aggression in women, but not in men. – 2004

Finger length & athletic ability.

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4 Responses to “Aggression, testosterone and your finger length!”


  1. [...] (Stick that long finger in your high belly button and nobody will catch you.) They also believe our aggressiveness or passiveness is related to finger length. As well as our level of motivation. And our results on SAT tests. So is the likelihood of [...]


  2. [...] (Stick that long finger in your high belly button and nobody will catch you.) They also believe our aggressiveness or passiveness is related to finger length. As well as our level of motivation. And our results on SAT tests. So is the likelihood of [...]


  3. [...] & ATHLETIC ABILITY: A secret your finger length reveals Finger length indicates athletic succes Finger length, agression & testosterone Finger length stories Digit ratio news Posted in palmistry, palmistry basics | Tagged big [...]

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