A new study published in the latest edition of the journal Intelligence has proven—once again—that genetics, and not environment, predetermines an individual’s intelligence quotient (IQ). This means that people with low IQs will have children with low IQs, and people with high IQs will have children with high IQs—although the study did not dare mention it—that this rule will apply to races as well.
The study, conducted by professors at Florida State University, the University of Nebraska, West Illinois University, King Abdulaziz in Saudi Arabia, and Erasmus University in the Netherlands, used an adoption-based research design model to draw their conclusions.
Using participants from a representative sample of between 5,500–7,000 non-adopted youth and a sample of between 250–300 adopted children from the National Longitudinal Study of Adolescent Health, the scientists first administered a Picture Vocabulary Test (PVT) to middle and high school students and then repeated the test when the participants were between the ages of 18 and 26.
The PVT served as an IQ test in which participants had to identify photos of people, places, and things.
Researchers also analyzed their parents’ behaviors—and found that parental socialization had no detectable influence on children’s intelligence later in life.
“Previous research that [claimed] parenting-related behaviors affect intelligence is perhaps incorrect because it hasn’t taken into account genetic transmission,” study author Kevin Beaver, a criminology professor at FSU, said in a press release.
Race-deniers have issued several studies claiming that parents who interact with their children over family dinners or by reading them bedtimes stories can boost their children’s IQ.
However, an analysis of children who shared no DNA with their adoptive parents eliminated the possibility that parental socialization influenced a child’s intelligence.
“In previous research, it looks as though parenting is having an effect on child intelligence, but in reality the parents who are more intelligent are doing these things and it is masking the genetic transformation of intelligence to their children,” Beaver said.
“The way you parent a child is not going to have a detectable effect on their IQ as long as that parenting is within normal bounds,” Beaver said.