The availability of this sample launched the first prospective study of these pairs. This practice, which led to the abandonment of hundreds of thousands of female infants, is indirectly responsible for the separate placement of infant twins.
(PsycINFO Database Record (c) 2019 APA, all rights reserved).Ĭhina’s One-Child Policy (1979–2015) limited rural families to two children and urban families to one child. We discuss the potential of the sibling-reared-apart design to advance developmental science. Using data from 118 sets of adoption-linked families, each consisting of an adoptive family and the adoptee's birth family, both of whom are raising at least a child in each home, we found that compared with families in the birth homes, (a) adoptive families had higher household incomes and maternal educational attainment (b) adoptive mothers displayed more guiding parenting, less harsh parenting, and less maternal depression and (c) socioeconomic differences between the two homes did not account for the behavioral differences in mothers. In this proof of concept approach, we tested whether rearing environments differed between adoptive and birth families. Supplementing the traditional adoption design of adopted child and adoptive parents with a sample of the adopted children's birth parents who raised their biological child(ren) at home (i.e., biological siblings of adoptees), this design provides opportunities to evaluate the role of specific rearing environments. Harnessing the principles of sibling comparison and animal cross-fostering designs, we introduce a novel approach: the siblings-reared-apart design. However, scientists have long known that a rigorous examination of environmental effects requires research designs that go beyond studies of genetically linked family members.
However, such data contribute to the growing number of cross-culturally separated twins, generating novel hypotheses that may be assessed using larger samples.Ī plethora of studies with parents and children who are biologically related has shown that the family environment plays an important role in child development. This case highlights the importance of both genetic and rearing factors on behavior, but does not allow firm conclusions regarding the extent to which these sources explain individual developmental differences. Their different rearing situations and life histories may explain current differences in their responses to meeting their twin. Consistent with previous studies, these dizygotic reared apart (DZA) twins showed discordance across some, but not all, traits. The twins’ advanced age also enabled a study of how co-twin differences in aging may be associated with current behavioral and social differences. This report compared the life histories, cognitive abilities, personality traits, psychomotor skills, medical characteristics, job satisfaction, social support and social relations of dizygotic (DZ) female twins reunited at 78, the world’s longest separated set. Twins living in different countries offer opportunities to explore associations between observed differences and experiential effects.
0 kommentar(er)
