This is an outstandingly innovative study. I think it will be of considerable interest to readers of the journal. I read it with great interest. Its originality is sky high, applying matrix factorisation methods to dyslexia diagnosis for the first time. It is also very strong methodologically – consider the time taken to undertake the 828 interviews on which the analysis is based!
I am very impressed by the very rare combination of the methodological rigour of the work undertaken together with the high technical level of understanding and analysis shown. Use of the entropy concept is of course a plus for readers of this journal! It is worth noting that this methodology could be used with benefit for a whole range of psychometric tests, with the Wechsler scales (IQ) being a natural one to explore since there is great interest in interpretation of such tests..