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The goal was to gain insight into whether comorbid disorder represents an LD subtype distinct from RD or from MD, which requires differentiated forms of intervention. Our analysis suggested that students with comorbid LD respond differently than those with MD, depending on the nature of mathematics intervention, and may therefore represent a distinctive subtype. By contrast, students with RD appear to respond to intervention in similar ways, regardless of whether they experience RD alone or in combination with MD. Results also suggest that distinctions between comorbid and single-order LD may depend on whether LD is defined in terms of lower- versus higher-order academic skill. Recommendations for future study are provided.<\/jats:p>","DOI":"10.1177\/0022219412468889","type":"journal-article","created":{"date-parts":[[2012,12,12]],"date-time":"2012-12-12T02:45:25Z","timestamp":1355280325000},"page":"534-548","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":47,"title":["Intervention Effects for Students With Comorbid Forms of Learning Disability"],"prefix":"10.1177","volume":"46","author":[{"given":"Lynn S.","family":"Fuchs","sequence":"first","affiliation":[{"name":"Vanderbilt University, Nashville, TN, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Douglas","family":"Fuchs","sequence":"additional","affiliation":[{"name":"Vanderbilt University, Nashville, TN, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donald L.","family":"Compton","sequence":"additional","affiliation":[{"name":"Vanderbilt University, Nashville, TN, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2012,12,11]]},"reference":[{"key":"bibr1-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1177\/00222194060390050401"},{"key":"bibr2-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1016\/j.jecp.2006.10.001"},{"key":"bibr3-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1007\/s11881-999-0019-8"},{"key":"bibr4-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1367\/A04-209R.1"},{"key":"bibr5-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0012-1649.28.5.874"},{"key":"bibr6-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-5826.2007.00228.x"},{"key":"bibr7-0022219412468889","volume-title":"Paper presented at the annual meeting of the Society for Research in Child Development","author":"Cirino P.","year":"2011"},{"key":"bibr8-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1177\/0022219410393012"},{"key":"bibr9-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1080\/10888430903001308"},{"key":"bibr10-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1007\/s11145-007-9083-9"},{"key":"bibr11-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1177\/0022219412442154"},{"key":"bibr12-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.93.2.251"},{"key":"bibr13-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.97.3.493"},{"key":"bibr14-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1177\/00222194020350060701"},{"key":"bibr15-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1177\/0022219412442167"},{"key":"bibr16-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.100.3.491"},{"key":"bibr17-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.95.2.293"},{"key":"bibr18-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.96.4.635"},{"key":"bibr19-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.100.1.30"},{"key":"bibr20-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467-8624.2010.01489.x"},{"key":"bibr21-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/a0020662"},{"key":"bibr22-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1016\/j.lindif.2009.09.003"},{"key":"bibr23-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/a0014701"},{"key":"bibr24-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0033-2909.114.2.345"},{"key":"bibr25-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1006\/jecp.2000.2561"},{"key":"bibr26-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1016\/S0885-2014(87)90075-X"},{"key":"bibr27-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1207\/s1532690xci0503_2"},{"key":"bibr28-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/h0032950"},{"key":"bibr29-0022219412468889","doi-asserted-by":"publisher","DOI":"10.1037\/0022-0663.93.3.615"},{"key":"bibr30-0022219412468889","first-page":"107","volume-title":"Why is math so hard for some children? 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