Maternal Personality, Evolution and the Sex Ratio: Do by Valerie J. Grant PDF

By Valerie J. Grant

ISBN-10: 020313396X

ISBN-13: 9780203133965

ISBN-10: 0415158796

ISBN-13: 9780415158794

ISBN-10: 041515880X

ISBN-13: 9780415158800

Girls who're dominant usually tend to have sons. Demographic reports convey that extra male teenagers are born after wars, but most folk think that their baby's intercourse is an issue of probability - made up our minds through the father's sperm. Valerie supply offers facts that the mother's character - that is regarding lady testosterone degrees - can really impression which sort of sperm fertilises the egg.Using facts from human and animal reviews Valerie supply discusses the consequences for human evolution, developmental psychology and reproductive biology. Her claims are arguable and the results of her findings a long way achieving. no matter if moms have sons or daughters will not be an issue of probability. it will probably rely on which intercourse child the mummy is extra fitted to elevate.

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Extra info for Maternal Personality, Evolution and the Sex Ratio: Do Mothers Control the Sex of the Infant?

Example text

If a postulated threshold amount of testosterone in women provides the physiological context in which a male infant is conceived, it is likely that the time-scale applying to the ratification of the sex of the infant would also apply to the psychological trait. It is possible that both physical and psychological stability over time are necessary to maintain a pregnancy. Recently it has been suggested that follicular, rather than serum, testosterone might be providing the quantitative differences at the physiological level (see Chapter 5).

Concepts in personality are hard to pin down and are frequently criticized as being vague or soft. Buss and Craik (1983) called them ‘fuzzy sets’ to emphasize their unclear boundaries. To compensate for this, a number of strategies have been developed. First, all personality tests need naive subjects. The tests should be administered only in settings where people are ignorant of the precise aims of the test. This is because it is far harder for subjects to stay neutral if they know what is being measured.

With modern recording techniques, these difficulties can be partially overcome. One can employ several trained observers and have them come to a consensus view, though even this does not provide the scientific reliability that physicists or chemists achieve in their work. From the researcher’s point of view, another important limitation of this method is the length of time it takes to become informed about each subject’s personality. Even if only one aspect of personality (such as dominance) were being measured, the observer would have to wait for examples of situations in which dominance (or lack of it) would be apparent.

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Maternal Personality, Evolution and the Sex Ratio: Do Mothers Control the Sex of the Infant? by Valerie J. Grant

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