How reliable is the Neanderthal Index?
is based on probabilistic predictions of the occurrence of your individual autosomal profile in archaic populations retaining Neanderthal genes. Because of the laws governing large numbers, this test can suggest strength or weakness of Neanderthal admixture in your overall genetic composition and, correspondingly, traits associated with Neanderthal ancestry. The statistics come from about 400 studies published in the field of forensic science, all publicly available. Each population was defined by a valid representative sample of living subjects in that location, usually about 200 tested individuals. There are no known biases in the statistics. For instance, they are not taken from purposive medical or genetic studies or criminal files like the FBI but academic and sound, objective sources.