A meta-analysis by Tran, Sanchez, Arellano, and Swanson (2011) of the published RTI literature found that the magnitude of effect size (ES) between responders and low responders at posttest was significantly moderated by the pretest ES and the type of dependent measure administered, whereas no significant moderating effects were found in the mixed…

The double-deficit hypothesis of developmental dyslexia proposes that deficits in phonological processing and naming speed represent independent sources of dysfunction in dyslexia. The present article is a review of the evidence for the double-deficit hypothesis, including a discussion of recent findings related to the hypothesis. Studies in this…

Meta-analysis on 25 studies found that both methodologically strong and weak studies demonstrated significant behavioral deficits of children with learning disabilities in 5 areas: on-task behavior, off-task behavior, conduct disorders, distractibility, and shy/withdrawn behavior. Effect sizes clustered around 1 standard deviation. (Author/DB)