Hence, the deaf never get a true sense of the phonemic structure of spoken language: they have no sounds in their heads that can represent the written letters.
Through a range of listening exercises, the researchers claim, the game replaces the brain's faulty phonemic representation with one that is more faithful to the sounds of speech.
While distance from Africa can explain as much as 85% of the genetic diversity of populations, a similar distance measurement can explain only 19% of the variation in phonemic diversity.