Intelligent and observant individuals have noticed general male-female differences in behavior and decision-making for many thousands of years. Now scientists have the tools that allow them to map out the brain differences in detail, and demonstrate how different chromosomes lead to different brains, which lead to different life paths.
In one of the largest studies looking at the “connectomes” of the sexes, Ragini Verma, PhD, an associate professor in the department of Radiology at the Perelman School of Medicine at the University of Pennsylvania, and colleagues found greater neural connectivity from front to back and within one hemisphere in males, suggesting their brains are structured to facilitate connectivity between perception and coordinated action. In contrast, in females, the wiring goes between the left and right hemispheres, suggesting that they facilitate communication between the analytical and intuition.
“These maps show us a stark difference–and complementarity–in the architecture of the human brain that helps provide a potential neural basis as to why men excel at certain tasks, and women at others,” said Verma. _Earth/Sky
Neuroscientists have discovered a large array of male-female brain differences — including some that become evident in 26 week-old developing fetuses inside the womb.
Different patterns of brain development lead to different behavioral preferences, and different life trajectories — from before birth, and throughout life.
Other research demonstrates that males exhibit a greater variance in the IQ frequency distribution than females, resulting in both more male geniuses and more males with low IQ, than females.
This shows that girls predominate over boys at the centre of the intelligence range, but there are fewer at the extremes, which is where boys are slightly more likely to be found. Assuming that the boy/girl difference is sustained in adulthood, then if men and women are promoted to jobs entirely on merit, and work equal hours, there will be 58 men to 42 women in the elite occupations. _James Thompson
But that comparison does not account for different occupational tastes for men and women, nor does it account for different life choices, such as child-raising, or choosing part-time work for other reasons.
Image: La Griffe du Lion — Intelligence, Gender, Race
And of course, the farther one goes out the path of aptitude in most technical fields, the wider and deeper the male-female gap will grow. The link between sex, autism, and genius, may partially explain some of the differences.
Scientists are just beginning to trace the connections between genes, brains, and life trajectories. It is still politically fashionable to deny gender and population differences in cognition. But then, cold reality has always been a different kettle of fish than political correctness.