How is Dyslexia Diagnosed?

Dyslexia is diagnosed by an educational psychologist who, in addition to other tests, will calculate a person's expected reading age from their IQ and age. The difference between this and the actual reading age as measured with a reading test, gives a measure of the reading difficulty. The term dyslexia is usually reserved for a severe degree of reading difficulty.

The psychologist also checks that the reduction in reading age is not due to any other cause such as inadequate schooling or low intelligence. Psychological assessments can be arranged through schools, or privately through a local Dyslexia Institute.