http://www.psychologytoday.com/blog/the-scientific-fundamentalist/200809/the-50-0-50-rule-why-parenting-has-virtually-no-effect-chi
In her 1995 article, and then in her 1998 book The Nurture Assumption: Why Children Turn Out the Way They Do, Harris methodically demolishes the universally held assumption that how parents raise their children is a major determining factor in how they turn out. Harris instead argues that parental socialization has very little effect on children because they are mostly socialized and influenced by their peers.
“Parents are often given too much credit for children who turn out well, and too much blame for children who turn out poorly. The source of causal influence is not in rearing variation, but in the genes and in unshared environmental variation.”
Behavior geneticists contend that the rough rule of thumb when it comes to the determinants of child development is 50-0-50, that is, roughly 50% of the variance in personality, behavior, and other traits is heritable (influenced by genes), roughly 0% by the shared environment (what happens within the family and is experienced by all siblings), and roughly 50% by the nonshared environment (what happens inside and outside of the family, not shared by siblings).
유전 50% 환경 50% ㅁㄴㅇㄹ
디아3
