There are no sex-related differences in biological primary mathematical skills, even in nonhuman primates
And later defines secondary mathematical skills as
the kinds of math taught in schools in the industrialized world
But it doesn't define what primary mathematical skills are.
Can anyone explain what is meant by the term?
Cognitive Neuroscience: The Biology of The Mind, 2nd ed. M. S. Gazzaniga, R. B. Ivry, G. R. Mangun.