the discriminatory uses of IQ tests were challenged

In Nazi Germany, the government authorized the murder of children based on low IQ.Following the Holocaust and the Civil Rights Movement,the discriminatory uses of IQ tests were challenged on both moral and scientific grounds.Scientists began to gather evidence of environmental impacts on IQ.For example, as IQ tests were periodically recalibrated over the 20th century,new generations scored consistently higher on old tests than each previous generation.This phenomenon, known as the Flynn Effect,happened much too fast to be caused by inherited evolutionary traits.