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Kramer et al 2008 is an excellent study of this question because it utilizes intervention, thus lending strength to the claim of causation, concluding that IQ was "significantly higher in the experimental group for both reading and writing". But is it the milk itself? Some argue that it's also the skin-to-skin contact, and the mother-child bonding. ...

Monozygotic twin studies are the general course of action for this kind of question. Genetic and environmental influences on multiple dimensions of religiosity: a twin study concludes there is a genetic component. A complete approach for these kind of studies is to take twins that have been separated to different households from birth and compare them to ...

Caveats Even when the degree of men's and women's desires to have children are forced by study parameters into yes/no pigeonholes, there are very few studies, and the results are arguably inconclusive. Also, men's and women's rates of desire to have children are continuously shifting, and thus the answer may change over time. Finally, the studies have been ...

I would like to point out impact of having kids. In typical case, kids have much greater impact on many levels of her life, than on his. I have seen more research on this topic, but now I found just a few examples Anne-Marie Nicot (2009) Impact of parenthood on careers of young men and women read - not original research Does having children create ...

I believe motherese exists to teach the infant to discriminate phonemes in the native language. Kuhl et al. (2005) show that during the first year language critical period, infants gain an increased ability to discriminate between phonemes of the native language, while their ability to discriminate between phonemes of non-native languages declines. ...

Fonagy and Target, although they do not specifically cite the term 'Motherese', believe that what they call 'Marking'- signalling an unreality or playfulness in mirrored displays of affect can play a crucial role in the development of a faculty they call 'Mentalization'. According to their model, newborns experience affect as all-pervading, and do not see ...