This is from dyslexia.com
Why Dyslexic Students Struggle with Phonics
Most teachers agree that difficulty with phonetic decoding is a hallmark characteristic of dyslexia. That is the reason that most dyslexia remediation is focused so heavily on phonics. It seems to make sense to intensify instruction in the area where the student seems to struggle the most.
This teaching strategy will often work well for students whose reading delays stem from poor preparation or inadequate exposure to reading before entering school. But children with dyslexia are often labeled as treatment “resisters,” as they do not seem to progress with even the most intensive and careful instruction. Researchers report that that 30-50% of children with learning disabilities fit this category.(2, 3)
The failure to respond to traditional intervention is so common among dyslexic students that it is now accepted as a valid alternative to formal diagnostic testing.(4)
Of course, these children are not willfully “resisting” anything. They struggle with phonetic strategies because their brains are wired differently. They simply are not able to categorize the sounds of language or connect sound to meaning in the same way as other students. Researchers now know that this difference is probably inborn and can be detected in early infancy.(5,6)
Additionally, research suggests that about 15% of children with dyslexia do not have the characteristic difficulties with phonics. Rather, if tested and diagnosed, they will be found to have a different subtype of dyslexia. They do well on tests of phonetic decoding, but have difficulty with irregular words, indicating a visual or surface type dyslexia. Phonics-based teaching won’t help that group because their reading barriers lie elsewhere. Almost two-thirds of children seem to have a mix of both types of dyslexia; for them, at best, phonetic instruction is only a partial solution.(7)
“Despite early difficulties with reading, some dyslexic children become proficient readers as teenagers or young adults. Brain scientists who have studied these late-blooming readers have found a surprising but consistent pattern. The dyslexic students who become good readers develop alternative mental strategies, relying more heavily on right hemisphere and frontal regions of their brains.(8, 9)
One long-term study of teenagers found that development of such “compensatory” brain pathways was the only distinguishing characteristic that could accurately predict which students would later become capable readers. (10)
In short, dyslexic students become good readers when they learn to use mental strategies other than phonetic decoding to gain reading proficiency. These strategies build upon the natural abilities of the students, teaching them to harness their strengths and use them to become accurate and efficient readers.”
References
2.Torgesen , J.K. (2000) Individual Differences in Response to Early Interventions in Reading: The Lingering Problem of Treatment Resisters.Learning Disabilities Research & Practice, Vol. 15, Issue 1, pp. 55-64; Al Otaiba, S., and Fuchs, D. (2006)
- Al Otaiba, S. & Fuchs, D. (2006) Who Are the Young Children for Whom Best Practices in Reading Are Ineffective? An Experimental and Longitudinal Study. Journal of Learning Disabilities, Vol 30, No. 3, pages 414-431.
- , M. J. (2012), Early identification and interventions for dyslexia: a contemporary view. Journal of Research in Special Educational Needs. Vol 13, Issue 1, pages 7-14.
- Van Leeuwen, T., Been, P., et al. (2006). Mismatch response is absent in 2-month-old infants at risk for dyslexia. Neuroreport. Vol. 17, Issue 4, pp 351-355.
- van Leeuwen, T., Been, P., et al. (2008).Two-month-old infants at risk for dyslexia do not discriminate /bAk/ from /dAk/: A brain-mapping study. Journal of Neurolinguistics. Vol 21, Issue 4, pp 333-348.
- , D. & Hanley, J.R. (2012, August). Subtypes of developmental dyslexia: Stanovich et al. (1997) revisited. Talk presented at BPS cognitive section conference, Glasgow.
- Shaywitz S.E., Shaywitz B.A., Fulbright R, et al (2003). Neural Systems for Compensation and Persistence: Young Adult Outcome of Childhood Reading Disability. Biological Psychiatry 54:25-33.
- Horwitz B, Rumsey J.M., Donahue B.C. (1998), Functional connectivity of the angular gyrus and dyslexia. Neurobiology: 95: 8939-8944.
10. Hoeft F., McCandliss B.D., Black J.M/, et al (2011). Neural systems predicting long-term outcome in dyslexia. PNAS, Vol. 108, No. 1, pp 361-366.