Rice T, Plomin R, De Fries J C
Percept Mot Skills. 1984 Jun;58(3):683-9. doi: 10.2466/pms.1984.58.3.683.
A longitudinal study of the development of hand preference in 152 adopted and 120 nonadopted (control) infants measured in natural behavioral situations at both 12 and 24 mo. of age is reported. Significant developmental trends were observed for both increasing strength and direction of handedness. Less than 10% of the infants exhibited a clear preference at 12 mo. of age, whereas about 30% were lateralized at 24 mo., with more boys than girls being left-handed. In contrast, over 90% of the parents of these children (both biological and adoptive parents of the adopted children and parents of the nonadopted children) were lateralized. Perhaps because so few infants were lateralized at either age, parent-offspring resemblances were inconsistent and the number of significant parent/child correlations was about that expected on the basis of chance alone.
本文报告了一项针对152名领养婴儿和120名非领养（对照）婴儿的纵向研究，该研究在婴儿12个月和24个月大时，于自然行为情境下测量其用手偏好的发展情况。研究观察到用手偏好的强度和方向都呈现出显著的发展趋势。在12个月大时，不到10%的婴儿表现出明显的偏好，而在24个月大时，约30%的婴儿出现了偏侧化，其中左撇子男孩比女孩更多。相比之下，这些孩子的父母（领养孩子的亲生父母和养父母以及非领养孩子的父母）中有超过90%出现了偏侧化。也许是因为在这两个年龄段出现偏侧化的婴儿都很少，亲子之间的相似性并不一致，显著的亲子相关性数量仅略高于基于随机概率预期的数量。
