Kin selection theory predicts that people should invest more in their full than their half
siblings, and more in their nieces and nephews via full siblings than via half siblings. To …

In general, adults invest more in related children compared to unrelated children. To test
whether this pattern reflects variations in psychological kinship estimates (ie, putative …

Abstract Evolutionary reasoning (Kin Selection Theory) predicts less favorable behaviors
directed by parents toward their unrelated children, relative to their biologically related …

Asymmetric grandparental caregiving is usually explained by the paternity certainty
hypothesis. Accordingly, the lower investment by grandfathers (GFs) and paternal …

Divorce and remarriage influence family relations, yet few studies explore changes in
grandparenting due to family recomposition. We study variations in grandparental …

Studies have shown that unequal parental treatment is associated with relationship quality
between siblings. However, it is unclear how it affects the relationship between full and half …

This study examines gift giving at Israeli weddings. In accordance with kin selection theory,
we hypothesized that wedding guests possessing greater genetic relatedness to the …

Using resemblance cues, people can identify highly related kin and treat them preferentially
over less related or unrelated individuals, all else being equal. However, differences in …

The purpose of this study was to test for an effect of biological relatedness on reasoning in a
Wason card selection task. The behavior of children in a day care was described in a …

Čím dál častějším typem rodinného soužití jsou dnes tzv. znovusložené rodiny. Velmi málo
je u nás ovšem známo o tom, jaká specifika mají vztahy mezi jednotlivými členy těchto rodin …