According to the dual route model, irregular words are read via the lexicon whereas nonwords are read via the non-lexical route, suggesting that they are read via grapheme to phoneme correspondences (Coltheart, Rastle, Perry, Langdon and Ziegler, 2001). Some researchers believe that developmental dyslexia is caused by a phonological problem, which occurs at the phonological awareness level, phonological processing or the phonological recoding. Hence, in a review, Rack, Snowling and Olson (1992) found that children with reading disabilities exhibit significantly lower phonological processing. They argued that nonword reading was accurate to measure phonological processing and deficits in children. Therefore, Rack et al (1992) support the account of a single reading deficit as they argue that dyslexia is caused by problems with phonological processing and subtypes of developmental dyslexia do not exist. Furthermore, Snowling (1980) found similar findings despite matching the control group on reading levels. Findings indicate that dyslexics display difficulty with phonological processing, which proves that there is a clear difficulty in reading
According to the dual route model, irregular words are read via the lexicon whereas nonwords are read via the non-lexical route, suggesting that they are read via grapheme to phoneme correspondences (Coltheart, Rastle, Perry, Langdon and Ziegler, 2001). Some researchers believe that developmental dyslexia is caused by a phonological problem, which occurs at the phonological awareness level, phonological processing or the phonological recoding. Hence, in a review, Rack, Snowling and Olson (1992) found that children with reading disabilities exhibit significantly lower phonological processing. They argued that nonword reading was accurate to measure phonological processing and deficits in children. Therefore, Rack et al (1992) support the account of a single reading deficit as they argue that dyslexia is caused by problems with phonological processing and subtypes of developmental dyslexia do not exist. Furthermore, Snowling (1980) found similar findings despite matching the control group on reading levels. Findings indicate that dyslexics display difficulty with phonological processing, which proves that there is a clear difficulty in reading