Despite historical emphasis on "specific" learning disabilities (SLDs), academic skills are strongly correlated across the curriculum. Thus, one can ask how specific SLDs truly are. To answer this question, we used bifactor models to identify variance shared across academic domains (academic "g"), as well as variance unique to…

Comparison of scores of 35 third- and fourth-grade students with learning disabilities on 3 major achievement tests found high positive correlations among the reading subtests. Agreement across all 3 tests for learning disability eligibility in the basic reading skills area was found in 20 of 35 cases and 9 of 35 cases in reading comprehension.…

Using a counterbalanced order, 34 learning disabled students were given the Peabody Individual Achievement Test and the Woodcock Reading Mastery Tests. When scores in reading recognition and comprehension subtests were compared, Peabody scores were higher, indicating that fewer students were certifiable as learning disabled by Peabody scores than…