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  1. Discriminative grandparental solicitude as reproductive strategy.Harald A. Euler & Barbara Weitzel - 1996 - Human Nature 7 (1):39-59.
    1,857 adults rated the grandparental solicitude they received in childhood. Through a simple model based on the evolutionary concepts of ontogenetically differentiated reproductive strategy and paternity confidence, an ordered discriminative pattern of grandparental caregiving was predicted and confirmed by solid main effects, based on 603 complete cases. The maternal grandmother was the most caring. Unlike prevalent gender stereotypes, she was followed by the maternal grandfather, the paternal grandmother, and the paternal grandfather. The preferential grandparental solicitude was not influenced by residential (...)
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  • Matrilateral biases in the investment of aunts and uncles.Steven J. C. Gaulin, Donald H. McBurney & Stephanie L. Brakeman-Wartell - 1997 - Human Nature 8 (2):139-151.
    In a study of the kin investment of aunts and uncles we show that the laterality effect expected as a result of paternity uncertainty is statistically reliable but somewhat smaller than the sex effect. Matrilateral aunts invest significantly more than patrilateral aunts, and the same is true for uncles. Regardless of laterality, however, aunts invest significantly more than uncles. Multivariate controls show that the matrilateral bias is fully independent of any age or distance confounds that might result from sex differences (...)
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