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…

The study, with 16 learning-disabled and 15 normally achieving college students, found a significant difference on reading comprehension scores between groups under timed conditions but no significant differences in test performance when both groups were provided extra time. (Author/DB)