“…Based on previous research, phonological and orthographic decoding were identified as critical subcomponents of general decoding ability (Gustafson et al, 2007;Tunmer & Greaney, 2010) and it was decided that measures of comprehension at the word, sentence, and text levels should be included (Kirby & Savage, 2008;Nettelbladt et al, 2008). Based on previous findings, two additional variables - processing speed and non-verbal ability (Joshi & Aaron, 2000;Singer & Crouse, 1981;Tiu et al, 2003) -were included.…”