How do you find the 4 digit ratio?

First, measure the length of your index finger from crease to tip. Then do the same for your ring finger. Divide the first number by the second to calculate your 2:4 digit ratio. For example, my index finger is 7.8cm and my ring finger is 8.2cm, so my ratio is 7.8÷8.2=0.95, which is precisely the average for a man.

What is the 2D:4D ratio in humans?

The normal range of 2D: 4D ratios among males and females have been reported to be 0.947±0.029 and 0.965±0.026, respectively [13]. Molecular level studies have observed that prenatal testosterone is related to HOX A and HOD A gene expression.

What does it mean when your fourth finger is longer than your index finger?

Research suggests that having a longer ring finger compared to index finger reflects greater exposure to male hormones during an individual’s time in their mother’s womb. There are differences between and within sexes in finger lengths associated with relatively more masculine versus feminine development.

What is a high 2D to 4D ratio?

2D stands for “second digit” — that’s your index finger, and 4D means “fourth digit” — your ring finger. So if your index finger is 2.9 inches long and your ring finger is 3.1 inches long, you have a 2D:4D ratio of . 935 (2.9/3.1 = . A longer index finger compared to your ring finger is considered a “high 2D:4D ratio.”

How do I know my 2D:4D ratio?

The 2D:4D ratio is the most studied digit ratio and is calculated by dividing the length of the index finger of a given hand by the length of the ring finger of the same hand.

What finger length says about testosterone?

Previous research has found that this “2D:4D” ratio — the ratio of the length of the second digit (the index finger) to that of the fourth digit (the ring finger) — reveals the amount of male hormones, mainly testosterone, a person is exposed to in the womb. The more testosterone, the longer the ring finger grows.

Is there a difference between male and female hands?

In our study, the index and ring fingers are significantly longer in males than females. Morphological sex differences in the absolute length of fingers have been demonstrated in various studies, male fingers being longer when compared with females.

How do you measure finger length ratio?

Measurement of finger length ratio is typically made by scanning the hands and drawing a line from the top of each finger to the middle of the lowest crease of the finger. To avoid bias, at least two people, double-blinded, independently measure the lengths of the index (second digit: 2D) and ring fingers (fourth digit: 4D).

How do you calculate digit ratio?

The digit ratios are computed by dividing the (mean) length of the index finger by the (mean) length of the ring finger for each hand. Studies indicate that differences in 2D:4D ratio are associated with levels of aggression, occupational interests, major psychiatric illness, and the incidence of pain [13,15,16,18].

What does the 2D 4D ratio tell us?

Studies indicate that differences in 2D:4D ratio are associated with levels of aggression, occupational interests, major psychiatric illness, and the incidence of pain [13,15,16,18]. Figure 11.9. Finger length ratio. The figure presents an example of different finger lengths.