This paper is a written version of the Norman Geschwind Lecture delivered to the
International Dyslexia Association on November 13, 1998. The first purpose is a theoretical …

Despite recent developments in research and theory, investigators and practitioners
continue to rely on rather traditional definitions of dyslexia. This paper discusses some of the …

Dyslexia has recently been defined as a developmental language disorder (Catts, 1989a;
Kamhi & Catts, 1989). In this article, the language basis of dyslexia and the current research …

This paper elaborates on the components of a working definition of developmental dyslexia.
It follows the general format of a paper by Lyon published in Annals of Dyslexia in 1995 …

The quest to define subtypes of poor readers has been an enticing one for the field of
reading. There is enormous face validity to the idea that reading-disabled individuals differ …

The overall goals of the issue are not, however, to suggest another unifying explanation for
the developmental dyslexias. The goals are (a) to address the specific role of the processes …

This article reports an extended 'case series' of studies comparing performance of three age
groups of dyslexic and matched control children on primitive skills. The dyslexic children …

D yslexia is typically defined as a reading and spell-ing problem that cannot be accounted
for by sensory or neurological damage, lack of educational opportunity, or low intelligence …

A coherent conception of dyslexia has been difficult to arrive at because research findings
have continually created logical paradoxes for the psychometric definition of reading …

The double-deficit hypothesis of developmental dyslexia proposes that deficits in
phonological processing and naming speed represent independent sources of dysfunction …