21
" In the statistical gargon used in psychology, p refers to the probability that the difference you see between two groups (of introverts and extroverts, say, or males and females) could have occurred by chance. As a general rule, psychologists report a difference between two groups as 'significant' if the probability that it could have occurred by chance is 1 in 20, or less. The possibility of getting significant results by chance is a problem in any area of research, but it's particularly acute for sex differences research. Supppose, for example, you're a neuroscientist interested in what parts of the brain are involved in mind reading. You get fifteen participants into a scanner and ask them to guess the emotion of people in photographs. Since you have both males and females in your group, you rin a quick check to ensure that the two groups' brains respond in the same way. They do. What do you do next? Most likely, you publish your results without mentioning gender at all in your report (except to note the number of male and female participants). What you don't do is publish your findings with the title " No Sex Differences in Neural Circuitry Involved in Understanding Others' Minds." This is perfectly reasonable. After all, you weren't looking for gender difference and there were only small numbers of each sex in your study. But remember that even if males and females, overall, respond the same way on a task, five percent of studies investigating this question will throw up a " significant" difference between the sexes by chance. As Hines has explained, sex is " easily assessed, routinely evaluated, and not always reported. Because it is more interesting to find a difference than to find no difference, the 19 failures to observe a difference between men and women go unreported, whereas the 1 in 20 finding of a difference is likely to be published." This contributes to the so-called file-drawer phenomenon, whereby studies that do find sex differences get published, but those that don't languish unpublished and unseen in a researcher's file drawer. "
23
" Here’s another example that some overworked mothers might find inspiring. We saw in Chapter 2 that being the one who produces
the sperm doesn’t dictate, by universal principle, that parenting is out of the portfolio. However, in the case of the rat (as with most
mammals), the balance of trade-offs make it more adaptive for males to leave parenting to the mothers. This might tempt us to take it for
granted that males, by virtue of their sex, therefore lack the capacity to care for pups. We might well assume that, through sexual selection, they lost or never acquired the biological capacity to parent: that it isn’t “in” their genes, hormones, or neural circuits. That it isn’t in their male nature. But bear in mind that one reliable feature of a male rat’s developmental system is a female rat that does the child care. So what happens when a scientist, under controlled laboratory conditions, simulates a first-wave feminist rodent movement by placing males in cages with pups but no females? Before too long you will see the male “mothering” the infant, in much the same way that females do. Feminism: 1. Sexual selection: nil. "
― Cordelia Fine , Testosterone Rex: Myths of Sex, Science, and Society
36
" Sexual differentiation begins approximately six weeks after conception, when in male children the gonads are formed and begin to manufacture male hormone, which has a profound effect on the future development of the embryo. In the female, on the other hand, the ovaries are not formed until the sixth month, by which time the greater size, weight, and muscular strength of the male is already established. This is the biological basis of the sexual dimorphism apparent in the great majority of societies known to anthropology, where child-rearing is almost invariably the responsibility of women, and hunting and warfare the responsibility of men. These differences have less to do with cultural `stereotypes' than some fashionable contemporary notions would have us believe. While it is true that at all ages males and females have far more in common than they have differences between them, there can be no doubt that some differences exist which have their roots in the biology of our species. Jung was quite clear about this. Again and again, he refers to the masculine and the feminine as two great archetypal principles, coexisting as equal and complementary parts of a balanced cosmic system, as expressed in the interplay of yin and yang in Taoist philosophy. These archetypal principles provide the foundations on which masculine and feminine stereotypes begin to do their work, providing an awareness of gender. Gender is the psychic recognition and social expression of the sex to which nature has assigned us, and a child's awareness of its gender is established by as early as eighteen months of age. "
― Anthony Stevens , Jung: A Very Short Introduction
