Thought I would add this link to the discussion. Here is a list of tests that evaluate the 5 main areas of reading: http://www.concordspedpac.org/TypesTests.html

A good evaluation will include tests in all 5 areas, and if problems are detected while the evaluator is administering the tests, he or she will most likely use more than one test to get more info.

Many times a dyslexic student may also have relative weaknesses in one or more of these areas: processing speed, working memory, executive functioning, sequencing, motor skills. Dyslexia is a spectrum, and no two dyslexics are exactly alike.