It is now well known that women are biologically somewhat less lateralized in brain function than men. This means simply that psychological functions in women are not localized into one or the other hemisphere of the brain to the same degree as in men. Mental abilities in women are more spread over both hemispheres. Even by age six, for example, a boy can recognize objects in his left hand by feel alone better than in his right hand. In girls both hands are equal. This shows that haptic recognition (as it is called) has already been primarily localized in the right hemisphere in boys but not in girls. And it is common knowledge that elderly men with a stroke or hemorrhage in the left hemisphere are more speechless than elderly women with a similar diagnosis.