On the diagnosis of dyslexia

The ICD-10 calls for the use of tables that account for the correlation bet ween intelligence acid spelling or reading, respectively (regression model) in the diagnosis of dyslexia, in this paper we discuss the consequences th at arise from this recommendation with respect to the interpretation of psy chometric tests. In addition, a table is presented that contains the data r equired to make diagnostic decisions based on the regression model. Further more, an expected prevalence rate was calculated using randomized computer data.