Profound developmental dyslexia is a severe disorder of a specific nature in learning to read. A stopping at the elementary reading level (grade II) and failure to reach the advanced reading level or a delay of 3-4 years in reading skills could be used as a basis for diagnosis. Such severe reading impairments are usually accompanied by equally severe impairments in the mastery of correct spelling. It is also most often co-occurring with increased difficulties in constructing written expression, stylistic and punctuation errors – referred to in medical classifications as disorders of expressive writing.


  1. „Uczeń z dysleksją w szkole” M. Bogdanowicz, A. Adryjanek, Operon, Gdynia 2009