Frederickson (2008) draws on evidence from a study conducted
by White, Milne and Rosen et al. (2006), which
found that 20% of individuals with dyslexia did not have a
phonological deficit. This may explain why phonics is ineffective
for this group of dyslexic individuals. Furthermore,
Nicolson and Fawcett (2004) highlight the difficulties experienced
by some individuals with dyslexia in using a
phonics strategy. Frederickson (2008) advises that other
possible causes of dyslexia must be considered if psychologists
are to be effective when intervening with children who
do not demonstrate phonological difficulties.