儿童发展中的社会过程和遗传的影响：双生子和养子女设计的新颖方法

Social Processes and Genetic Influences in Child Development: Novel Uses of Twin and Adoption Designs

双生子与养子女的研究尤其能对环境影响的机制提供证据。本文扼要地概述了“非共享环境与青少年发展”（NEAD）计划的部分研究成果，特别是子代对父代影响的成果，同时本文也讨论了今后计量行为遗传学的可能走向。

Genetically informed design， such as twin and adoption studies， help delineate mechanisms of social influence on individual differences in a wide range of psychological characteristics. This paper reviews findings from the Nonshared Environment of Adolescent Development (NEAD) study and its contribution to our understanding of environmental mechanisms for adolescent development， with special attention to child effect on family systems. Future directions for quantitative behavior genetics research are discussed.