The Ongoing Mystery Of How DNA Affects Intelligence
Plomin, one of the early pioneers of the twin and adoption studies that paved the way for current research linking genetics and human behavior, is an unabashed cheerleader for genetic intelligence testing. Hundreds of studies of twins and adoptive families have shown that intelligence is roughly 50 percent heritable, meaning that about half of the differences between people in cognitive ability are due to their genetic makeup. Despite talk of a “genetic test for intelligence,” polygenic scores aren’t themselves intelligence; they’re a statistical construct weakly associated with it.Nevertheless, once solid research linking specific genes to intelligence was published, it didn’t take long for personal genomics companies to develop consumer products around it.
Source: onezero.medium.com