Kin Relationships and the Caregiving Biases of Grandparents, Aunts, and Uncles : A Two-Generational Questionnaire Study.

Kin Investment Biases of Grandparents, Aunts and Uncles in Germany, Greece and the Usa: Evolutionary Interpretations of Different Kin Caregiving Behavior

Human Kin Investment as a Function of Genetic Relatedness and Lineage

Two independent samples of students were asked to allocate fictional lotteries of varying dollar amounts to their blood relatives. In both studies, a reliable genetic relatedness by lineage interaction emerged, such that the genetic effect was a more positive predictor of percent of money allocated for relatives of a direct lineage (e.g., parents, grandparents) than it was for peripheral relati...

Darwinian grandparenting: preferential investment in more certain kin.

Studies on grandparental investment have revealed that mothers' fathers are emotionally closer to their grandchildren than are fathers' mothers. In the current study, it was hypothesized that this difference is caused by the fact that fathers' mothers often have the potential to invest in genetically more certain kin (children through their daughters). To test this hypothesis, 787 participants ...

The mediating role of caregiving behaviors in the relationship between object relations and marital intimacy

The aim of this study was to explain the mediating role of caring behaviors in the relationship between object relationships and marital intimacy. The method of the present study was correlational and the statistical population of this study was married women and men in Tehran who have been married for over two years. 400 people were selected by convenience sampling (200 females and 200 males) ...

Birth defects in uncles and aunts from Irish families with neural tube defects.

BACKGROUND Previous studies suggested an excess of matrilineal cases of neural tube defects among distant relatives in NTD families. There is little information on patterns of heredity of other birth defects among distant relatives. METHODS Between 1995 and 2003, 78 nuclear families and 373 uncles and aunts were interviewed about birth defects among uncles and aunts in Irish families with an ...