Post on 30-Oct-2015
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THE CASANOVA EFFECT
THE CASANOVA EFFECT
Imagine deciding to quit your job and embark on a new career as a professional palmist. You invest in the requisite purple caftan, set up a small booth on the busy promenade in the nearest seaside town, and nervously await your first customer. A few moments later, a man walks in, sits down, and crosses your palm with silver. You carefully look at the stranger s hand and try to spot any telltale clues that might give you a magical insight into his life. Is his soft skin a sign of office work? Do his chewed nails signal a recent job loss? Is his calloused palm suggestive of too much time at the gymor does it reflect a strong need to find a love interest? According to some psychologists, you would be much
better off ignoring his soft skin, chewed nails, and calloused palm, instead shifting your attention to the length of his index and ring fingers. Theirargument is a curiousone,whichlinksthe
famous eighteenth-centurywomanizerGiacomo Casanova with some of Britains most famous soccer players.
According
to
his
colorful autobiography,
Casanovaenjoyedthe company ofmanyEuropean
kings, cardinals, poets, and artists.7 At one point he describes how he spent time with the eminent German painter Anton Raphael Mengs. After a while, they started to argue, with Mengs berating Casanova for not observing his religious duties and Casanovaaccusing Mengs of being a child-beating alcoholic. As the situation
moved from bad to worse, Casanova took it upon himself to criticize one of Mengss paintings. He pointed out that the index finger of a principal male character was longerthanthe
ringfinger and
was therefore anatomically incorrect, as mens ring fingers were longer than their index fingers. Mengsdefendedhis work by showing that his own index finger was longer than his ring finger. Casanova stuck to his argument, showing that his ring finger was longer than his index finger, claiming that this was true of most men and arguing that his hands were thus like that of all the children descended from Adam.
Affronted,
Mengs
asked Casanova, Then from whom do you suppose
I am descended?Casanova replied, I have no idea; but it is certain
that you are not of my species. As the argument escalated, they raised a bet of one hundred pistoles on the issue and promptlyrounded
up
thepainter s servants to discover who was right. A quickperusaloftheservantshands revealed that Casanova was correct, but Mengs quickly saved face by rejoicing in the fact that he could now boast of being unique in something.
Evolutionary
psychologistJohn Manning,at theUniversity of Central Lancashire, has dedicated much of his professionallife
tostudying
the differences in finger lengths described by Casanova. He argues that they reveal an important insight into the human psyche.8Manning and his colleagues measure the length of peoples index and ring fingers,
and then divide the first length by the secondtoobtainwhatiscommonly referred to as the 2D:4D (second digit to fourth digit) ratio. If the ring and index fingers are exactly the same length, then the 2D:4D ratio will be 1.00. If, however, the ring finger is longer than the index finger, then the 2D:4D ratio will be less than 1.00, and conversely, if the index finger is longer than the ring finger, then the 2D:4D ratio will be greater than 1.00.
The research has conclusively revealed that the finger-length pattern described by Casanova tends to be associated far more with men than with women, with the average 2D:4D ratio for men being about
.98, while the corresponding figure for women hoversaround1.00.In short, mens ring fingers tend to be longer than
theirindexfingers,whereaswomens fingers tend to be about the same length.
Why should this be the case? According to Manning, the explanation dates back to the very start of a persons life and is closely linked to testosterone levels in the womb. After about six weeks or so, the level of testosterone in the womb changes, and those fetuses that are exposed to large amounts of the hormone develop more male characteristics, while those exposed tomuch smaller levels
developmore female
attributes.
Manning argues
that testosterone
also plays akey role
in determining the length of a persons index and ring fingers, with high levels resulting in arelativelylongring finger.
If Manningstheory isright,
apersons
2D:4D ratio is related to the amount of
testosterone that they were exposed to in the womb and should provide a good indication of the degree to which they possess psychological and physical traits commonly
associatedwitheither masculinity or femininity. According to this theory, people with low 2D:4D ratios will be more likely than others to exhibit masculinecharacteristics,
while those withhigh
2D:4Dratios willbe significantly more likely to be in touch with their feminine side.
It is a controversial idea and one that has attracted its fair share of criticism.9However, proponents argue that a large
body of research now supports the theory,
includingworkexaminingphysical
strengthandsportingsuccess.Inone
study, a group of men had their finger
lengths measured and were then asked to complete various strength tests, including shoulder, overhead, and bench presses.10Theresultsrevealedtheexpected relationships. Men who had lower 2D:4D ratios were able to lift heavier weights than those with higher ratios. Often the differences were far from trivial. For example, for overhead presses, those with
2D:4D ratios of .91 lifted twenty-four pounds more than those with ratios of morethan 1.00.Inanother
study, researchersturned theirattentionto student sprinters and found that their times in the 100-meter, 800-meter, and 1,500- meter races were all related to 2D:4D ratios,
with thefaster runnershaving
lowerratios.11 Inanotherexperiment, Manning and his team managed to measure
the finger lengths of some of the best- known and most highly skilled soccer players in Britain.12 Attending a centenary celebration designed to mark the end of the 100th English League Championship, the researchers persuaded more than three hundredplayerstohavetheirhands photocopied,and
thencompared
their finger lengths to those of a control group of more than five hundred men who had never ventured onto a soccer field. The
2D:4Dratio
oftheplayerswas significantlylower than
thatof
the controls. Strong differences also emerged among the different groups of players, with high-performing legends and those who had played at an international level having especially low ratios.
Other work suggests that the 2D:4D
effectmay
alsoextend
to
certain psychological traits.
Agreatdealof research has
shown that men tend to outperform women in tests that involve the mental manipulation of spatial information (perhaps explaining the alleged fondness of women for turning maps around when navigating).Inline
with this
finding, Manningbelieves
that
hisresearch suggests that men with low 2D:4D ratios (who therefore, according to his theory, possess more masculine brains) tend to outperformothers
on
these
tasks.13Similarly, he cites other work suggesting that when it comes to personality, women with lower 2D:4D ratios tend to exhibit traits that the researchers believe to be more male-oriented, including being more
assertive and risk taking.14According to Manning, the effect even extends to making music. Noting that there areabout tentimes
as many male professional
musicians
asfemales, Manning argues that musical ability is associated more with a masculine brain than a feminine brain and that therefore highly skilled performers should have an especially low 2D:4D ratio. To test this idea, he measured the 2D:4D ratio of fifty- four malemembers of
a well-known British
symphonyorchestra.
Several sections of the orchestra were organized in a hierarchical way, with more highly skilled musicians taking key positions. Manning discovered that performers in these
keypositions
did
indeed
have significantly lower 2D:4D ratios than their fellow musicians.15In order to obtain a mysterious insight into yourself and others, it may well be better to forget traditional palmistry and insteadfocusyourattentiononthe apparently important relative lengths of the index finger and the ring finger.