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Only three of the four groups predicted by the model could be identified. There were no group differences in IQ or attention problems. The three groups showed different neuropsychological profiles, involving functional domains other than reading and language. Differences also emerged in nonverbal low-level information processing. The double-deficit group was generally most severely affected. The double-deficit groupings identify children with different neuropsychological profiles and variation in the efficiency of basic online information processing, extending beyond the oral and written language domain.<\/jats:p>","DOI":"10.1177\/00222194040370050701","type":"journal-article","created":{"date-parts":[[2007,12,14]],"date-time":"2007-12-14T00:52:20Z","timestamp":1197593540000},"page":"451-461","source":"Crossref","is-referenced-by-count":15,"title":["Neurodevelopmental Characteristics of Children with Learning Impairments Classified According to the Double-Deficit Hypothesis"],"prefix":"10.1177","volume":"37","author":[{"given":"Deborah P.","family":"Waber","sequence":"first","affiliation":[{"name":"Department of Psychiatry at the Children's Hospital, , Department of Psychiatry, Harvard Medical School"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter W.","family":"Forbes","sequence":"additional","affiliation":[{"name":"Clinical Research Program at the Children's Hospital, Boston"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter H.","family":"Wolff","sequence":"additional","affiliation":[{"name":"Department of Psychiatry at the Children's Hospital, Department of Psychiatry, Harvard Medical School"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael D.","family":"Weiler","sequence":"additional","affiliation":[{"name":"Cranston, Rhode Island"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2004,9,1]]},"reference":[{"key":"atypb1","doi-asserted-by":"publisher","DOI":"10.1111\/0938-8982.00016"},{"key":"atypb2","doi-asserted-by":"publisher","DOI":"10.1007\/s11881-997-0021-y"},{"key":"atypb3","volume-title":"The developmental test of visual\u2014motor integration (3rd rev.)","author":"Beery, K.E.","year":"1989"},{"key":"atypb4","volume-title":"The developmental scoring system for the Rey-Osterrieth Complex Figure","author":"Bernstein, J.H.","year":"1996"},{"key":"atypb5","doi-asserted-by":"publisher","DOI":"10.1207\/s1532799xssr0301_2"},{"key":"atypb6","doi-asserted-by":"publisher","DOI":"10.1007\/BF01026919"},{"key":"atypb7","first-page":"773","volume":"21","author":"Denckla, M.B.","year":"1985","journal-title":"Psychopharmacology Bulletin"},{"key":"atypb8","doi-asserted-by":"publisher","DOI":"10.1016\/0028-3932(76)90075-0"},{"key":"atypb9","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.86.1.6"},{"key":"atypb10","first-page":"257","volume":"2","author":"Gaddes, W.H.","year":"1975","journal-title":"Language"},{"key":"atypb11","volume-title":"Two-factor index of social position. 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