同卵双胞胎和异卵双胞胎的孪生亲密关系：智商遗传力分析中的一个偏差因素？

Cotwin closeness in monozygotic and dizygotic twins: a biasing factor in IQ heritability analysis?

作者信息

Tambs K, Sundet J M, Berg K

出版信息

Acta Genet Med Gemellol (Roma). 1985;34(1-2):33-9. doi: 10.1017/s000156600000489x.

Abstract

For 98 pairs of MZ twins, four measures indicating degree of cotwin closeness were correlated with absolute differences between IQ scores within pairs. In two different twin samples (40 MZ vs 40 DZ pairs and 169 MZ vs 174 DZ pairs, respectively), means and standard deviations in the closeness variables were obtained for MZ and DZ pairs. Whereas MZ cotwins were clearly closer than DZ cotwins, the relation between cotwin closeness and similarity in IQ seemed rather weak and ambiguous. "Years lived together in childhood home" were positively related to similarity in IQ (P less than 0.01), whereas subjective feeling of closeness in contact tended to be negatively related to similarity in IQ.

摘要

对于98对同卵双胞胎，四项表明双胞胎亲密程度的指标与双胞胎对之间智商分数的绝对差异相关。在两个不同的双胞胎样本中（分别为40对同卵双胞胎与40对异卵双胞胎，以及169对同卵双胞胎与174对异卵双胞胎），获取了同卵双胞胎对和异卵双胞胎对在亲密程度变量上的均值和标准差。虽然同卵双胞胎显然比异卵双胞胎更亲密，但双胞胎亲密程度与智商相似性之间的关系似乎相当微弱且不明确。“在童年家中共同生活的年数”与智商相似性呈正相关（P小于0.01），而接触中的亲密主观感受往往与智商相似性呈负相关。