May 24, 2011
Various studies have shown that babies exposed to higher levels of testosterone when developing in the uterus have longer ring fingers as adults, and higher levels of oestrogen typically result in longer pointer fingers. However, testosterone & oestrogen levels also affect the rest of the body, including a person’s physical appearance. The ratio between the length of the index and ring fingers has been found to be a good indication for a variety of social and economic factors, thought to be directly or indirectly related to the effects of the prenatal testosterone. These photographs are part of a study on beauty and sexual attraction.
In 2010 a Meta-analysis studyby researchers from the University of Ontario, Penn State, and the Centre for Addiction and Mental Health found that the second to fourth finger length ratio (2D:4D) serves as an indicator of sexual orientation. The study included 1.618 heterosexual men, 1.693 heterosexual women, 1.503 gay men, and 1.014 lesbians.
In addition to identifying the normative heterosexual sex difference in 2D:4D for both hands, the researchers found that heterosexual women had higher (more feminine) left- and right-hand 2D:4D than did lesbians. However… the researchers found NO difference between heterosexual and gay men (though moderator analyses by the researchers suggested that ethnicity explained some between-studies variation in men).
MORE FINGER & DIGIT RATIO REPORTS ARE AVAILABLE AT:
Chiromancy (cheiromancy), the notorious pseudoscience, has for two decades been creeping back into scientific favour. Is John T. Manning its new high priest?
The simplicity of the measure has inevitably launched a thousand research papers on hundreds of topics – including: heart attacks, breast cancer, running speed, football ability, sexual attraction, homosexuality, and schizophrenia.
|THE NEW CHIROMANCY
How to understand the new Chiromancy? Hold up your right hand, and put your palm towards you and keep your fingers together; then measure the lengths of the 2th finger (index finger) and 4th finger (ring finger) – measure each finger from the tip to the crease where it joins the palm: see the picture below. Dividing the length of the 2th finger by the length of the 4th finger gives what in the jargon is known as the 2D:4D ratio!!!
Folk mythology has long suggested that men with large hands or feet will be well endowed, but there seems to be biological truth in that adage, with biologists finding that the same gene family, the Hox genes, underpins the development of “apical appendages”.
Professor John T. Manning says:
“I believe that the pattern and nature of our decline in middle life and the disease which will eventually lead to our death, is dependent to a large extent on our experiences as a foetus.”
The handedness-expert Chris McManon (psychologist from the UK) wrote a critical review of John T. Mannings ‘digit ratio’ work. You can read the full review via:
• The finger book – about the 2D:4D digit ratio
• Hands up: what your fingers reveal about you
• Digit ratio: a pointer to fertility, behavior and health
• More digit ratio and finger length news