Department of Psychology, The Hebrew University of Jerusalem Jerusalem, Israel.
Ashkelon Academic College Ashkelon, Israel.
Front Psychol. 2014 May 22;5:486. doi: 10.3389/fpsyg.2014.00486. eCollection 2014.
Extensive non-maternal childcare plays an important role in children's development. This study examined a potential coping mechanism for dealing with daily separation from caregivers involved in childcare experience - children's development of attachments toward inanimate objects. We employed the twin design to estimate relative environmental and genetic contributions to the presence of object attachment, and assess whether childcare explains some of the environmental variation in this developmental phenomenon. Mothers reported about 1122 3-year-old twin pairs. Variation in object attachment was accounted for by heritability (48%) and shared environment (48%), with childcare quantity accounting for 2.2% of the shared environment effect. Children who spent half-days in childcare were significantly less likely to attach to objects relative to children who attended full-day childcare.
广泛的非母亲照料在儿童发展中起着重要作用。本研究考察了一种潜在的应对机制，即儿童通过与无生命物体建立依恋关系来应对与照料者日常分离，我们采用双胞胎设计来估计环境和遗传对物体依恋存在的相对贡献，并评估照料是否解释了这种发展现象的一些环境变异。母亲报告了大约 1122 对 3 岁的双胞胎。物体依恋的变异由遗传（48%）和共享环境（48%）解释，日托数量占共享环境效应的 2.2%。与全日托的儿童相比，半日托的儿童明显不太可能与物体建立依恋关系。
