Fingers of fate – how to measure your ‘2D:4D finger ratio’?

October 1, 2009

Distribution of finger length ratios among women.

The average ‘digit ratio’ is 0.98 among women (while 0.96 among men).

OK, you heard about those finger stories, but do you know how to measure your ‘digit ratio’?

Professor John T. Manning’s “digit ratio” – refers to the ratio between the length of your index finger and your ring finger. The following describes the basic findings of this ‘scientific’ finger research + a 3-step method on how to measure your ‘digit ratio’!

Studies have found that during gestation, testosterone has powerful effects on the developing body and brain, and can cause increased confidence, (financial) risk preferences and search persistence, as well as heightened vigiance and quickened reaction times.

The most common measure is the ratio of the index to ring finger (2D:4D) on the right hand. A relatively longer ring finger – lower 2D:4D – indicates higher prenatal testosterone levels. Men typically have scores below 1, women above 1.

HOW TO MEASURE YOUR ‘DIGIT RATIO’?

1. Place your right hand firmly on the plate of a photocopier with fingers straight. Close cover of place a sheet of paper over your hand to prevent glare from overhead lights. Ensure that the bottom crease and finger tip can be clearly seen in the photocopy.

2. Use a ruler of calipers to measure the distance from the middle of the bottom crease to the tip of the finger.

3. Once you have the measures for both your ring and index finger, then divide the length of your index finger by the length of your ring finger. The result is 2D:4D (2nd digit divided by 4th digit).

Source: University of Cambridge.

Fingers of fate - how to measure your '2D:4D finger ratio'?

SUGGESTIONS FOR FURTHER READING:

Second to fourth digit ratio, testosterone and perceived male dominance!
Finger ratio & financial risk preference!
Finger research says: ‘lingerie sharpens the financial mind in men’!
More finger ratio research

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