“…This learning environment supports the child's access to long-term representations, shortterm maintenance and manipulation, sustained attention and engagement in working with the material, and is thus likely to facilitate learning (Mayer, 2008). In fact, Omega-is and its predecessors were developed with difficult learning situations in mind, and the program and its forerunners have shown positive effects on both word reading and reading comprehension in typically developing as well as children with, e.g., dyslexia, autism, and attention deficit hyperactivity disorder (e.g., Fälth, Gustafson, Tjus, Heimann, & Svensson, 2013;Gustafson, Fälth, Svensson, Tjus, & Heimann, 2011;Heimann, Nelson, Gillberg, & Karnevik, 1993;Heimann, Nelson, Tjus, & Gillberg, 1995;Helland, Tjus, Hovden, Ofte, & Heimann, 2011;Tjus, Heimann, & Nelson, 1998. Early versions of the program also indicated positive effects on reading development in deaf children (Prinz, Nelson, & Stedt, 1982;Prinz & Nelson, 1985).…”