… heard of. When Tiffany Hogan tells parents their child has dyslexia, a condition that makes it difficult to read words on a page, they are understandably concerned. … mystery because these children have difficulty learning and understanding language for no obvious reason, something that comes with ease for most children,” says Hogan, … from Royal Holloway, University of London, and Yaacov Petscher from Florida State University—to track the students with DLD from kindergarten to second grade. …