Michelle, there's some information on the What Works Clearing House for evidence for the long-term efficacy of LMB. It's not super well studied, but it does seem to have decent evidence behind it.
I looked into it because my DD went through all of OG at age 10, progressing from kindergarten level phonemic awareness to 7th grade spelling skills in a span of 4 months. Her intervention was 40 minutes per day, 5 days a week. At that time, I couldn't find any evidence for such a short OG intervention and if the intervention sticks. All evidence was for 2 year programs. DD simply went through the two year program at lightening speed. Hence, I looked at LMB as an analogous model to what we'd experienced.
She's maintained her gains for 2+ years, and continued to progress in her spelling skills.
When I expressed concern about her maintaining these gains without continued review and support, the school's OG specialist sent me the following:
"This information is from "Multisensory Teaching of Basic Language Skills" 3rd edition by Judith R. Birsh. It states, "Several studies on the effect of intensive, systematic, structured language instruction on children with reading disabilities have shown that functional brain patterns may become more normalized as a consequence of instruction (Berninger et. al., 2003; Blachman et. al., 2003, Meyler, Keller Cherkassky, Garbieli, &Just, 2008; Shaywitz, 2003; Simos et. al., 2002).
"Also, functional connectivity differences in children with dyslexia in comparison with controls were eliminated after a 3-week treatment program consisting of explicit instruction in the alphabetic principle and linguistic awareness training (Richards & Berninger, 2008).
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Last edited by geofizz; 11/24/14 10:09 AM.
