Robin L. Peterson|Bruce F. Pennington|Richard K. Olson|Sally J. Wadsworth
Longitudinal Stability of Phonological and Surface Subtypes of Developmental Dyslexia
University of Denver|University of Denver|University of Colorado System|University of Colorado System
limited evidence supports external validity distinction developmental phonological surface dyslexia previously identified children ages 8 13 meeting criteria subtypes peterson pennington olson 2013 report reading related skills approximately 5 years later longitudinal stability subtype membership fair appeared stronger phonological surface dyslexia phonological dyslexia associated pronounced phonological awareness deficit subgroups otherwise similar cognitive profiles subtype inform prognosis results provide modest evidence validity distinction although clinical utility