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Lookup NU author(s): Thomas Pollet, Professor Daniel Nettle
Evolutionary theory suggests that maternal grandparents will invest more in their grandchildren than paternal grandparents, due to the difference between the certainty of maternity and the uncertainty of paternity. Most tests of this prediction have tended to use retrospective ratings by grandchildren rather than examining grandparental behaviour. Using a large-scale data set from the UK (n>7000), significant differences are shown between maternal and paternal grandparents in terms of frequencies of contact with their newborn grandchildren, while controlling for a wide range of other variables. Maternal grandparents also provided a significantly wider range of financial benefits than paternal grandparents. Maternal grandparents were also more likely to provide essentials and gifts and extras for the baby. Multiple correspondence analysis showed that contact frequencies systematically related to other measures of grandparental investment, indicating that contact frequencies are a useful proxy measure to examine overall investment. Findings are discussed with reference to the paternity uncertainty hypothesis.
Author(s): Pollet TV, Nelissen M, Nettle D
Publication type: Article
Publication status: Published
Journal: Journal of Biosocial Science
Year: 2009
Volume: 41
Issue: 3
Pages: 355-379
Date deposited: 10/08/2011
ISSN (print): 0021-9320
ISSN (electronic): 1469-7599
Publisher: Cambridge University Press
URL: http://dx.doi.org/10.1017/S0021932009003307
DOI: 10.1017/S0021932009003307
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