Talk:Double deficit (education)

Untitled
This topic may be better presented as part of the "dyslexia" topic. The double deficit hypothesis is specifically about dyslexia and not about education in general, or even about reading difficulties in general. Therefore, I propose merging this article with the dyslexia page. Note that the dyslexia page is still in considerable flux and needs a great deal of work. However, this topic rightly belongs if not *in* the dyslexia article then set up as part of a set of articles related to dyslexia. smoran 19:31, 28 May 2007 (UTC)

Controversy
2009 Research does not support the Double deficit Hypothesy

Naming problems do not reflect a second independent core deficit in dyslexia: Double deficits explored. Vaessen A, Gerretsen P, Blomert L.

Department of Cognitive Neuroscience, University of Maastricht, Maastricht 6200 MD, The Netherlands. a.vaessen@psychology.unimaas.nl

The double deficit hypothesis states that naming speed problems represent a second core deficit in dyslexia independent from a phonological deficit. The current study investigated the main assumptions of this hypothesis in a large sample of well-diagnosed dyslexics. The three main findings were that (a) naming speed was consistently related only to reading speed; (b) phonological processing speed and naming speed loaded on the same factor, and this factor contributed strongly to reading speed; and (c) although general processing speed was involved in speeded naming of visual items, it did not explain the relationship between naming speed and reading speed. The results do not provide support for the existence of a second independent core naming deficit in dyslexia and indicate that speeded naming tasks are mainly phonological processing speed tasks with an important addition: fast cross-modal matching of visual symbols and phonological codes.

[PubMed - in process http://www.ncbi.nlm.nih.gov/pubmed/19278686

dolfrog (talk) 03:53, 22 May 2009 (UTC)