Low 2D:4D Values Are Associated with Video Game Addiction


Androgen-dependent signaling regulates the growth of the fingers on the human hand during embryogenesis. A higher androgen load results in lower 2D:4D (second digit to fourth digit) ratio values. Prenatal androgen exposure also impacts brain development. 2D:4D values are usually lower in males and are viewed as a proxy of male brain organization. Here, we quantified video gaming behavior in young males. We found lower mean 2D:4D values in subjects who were classified according to the CSAS-II as having at-risk/addicted behavior (n = 27) compared with individuals with unproblematic video gaming behavior (n = 27). Thus, prenatal androgen exposure and a hyper-male brain organization, as represented by low 2D:4D values, are associated with problematic video gaming behavior. These results may be used to improve the diagnosis, prediction, and prevention of video game addiction.

Full report is available here:

(This concerns a study from Germany: Funding for this study was provided by intramural grants from the University Hospital of the Friedrich-Alexander-University of Erlangen-Nuremberg and by the Ministry for Science and Culture of Lower Saxony.)

The illustrations provide an impression of the results:


Long ring fingers drive faster!

Long ring fingers drive faster!

Finger length & traffic violations: long ring fingers drive faster!!

New research from Germany has pointed out that men with long ring fingers (low 2D:4D ratio) may more easily get into trouble – by driving too fast, overtaking on dangerous roads, or parking illegally. For, men with long ring fingers reported more traffic violations!

Earlier research pointed out that men with long ring fingers show more: agression, assertiveness, and they take more financial risks!

New ring finger research from Germany:

Researchers at the University of Mainz recruited 77 male drivers at an average age of 38. Each volunteer had their left hand scanned to measure the difference in length between the ring and index fingers.

They then had to provide details of all driving offences within the previous five years. Just over a third of the drivers reported having penalty points on their licences, ranging from one to 20, for offences ranging from speeding to drink driving.

The results, published in the journal Accident Analysis and Prevention, showed men with longer ring fingers were more likely to have offended.

In a report on their findings the researchers said: ‘A longer ring finger than index finger was related to more traffic violations. Hormone exposure in the womb might increase traffic violations in later life.’

Learn how to measure your 2D:4D finger length ratio!

By the way, earlier reports pointed out that Jamaicans are known for having the long ring finger, and young sprinters with long ring fingers appear to have more sprint talent (indicated by faster sprints) … some anecdotal evidence is provided by Usain Bolt, the world’s fastest man – who has the long ring finger … and had a car-crash accident earlier this year!!

Usain Bolt's car crash photo shoot!


About: long ring fingers, testosterone & men who drive too fast!
Finger length & agression: a continuing story!
What they say about men with long ring fingers!
More stories about the ring finger!
Usain Bolt has the long ring finger – a measure for sprint talent!