The current study tested a multiple-cognitive predictor model of word reading, math ability, and attention in a community-based sample of twins ages 8 to 16 years (N = 636). The objective was to identify cognitive predictors unique to each skill domain as well as cognitive predictors shared among skills that could help explain their overlap and…

Although approximately 5-8% of students have a mathematical learning disability (MLD), researchers have yet to develop a consensus operational definition. To examine how MLD has been identified and what mathematics topics have been explored, the authors conducted a systematic review of 165 studies on MLD published between 1974 and 2013. To move…

Learning disabled college students (N=16) were tested to compare the Wide Range Achievement Test (WRAT) with the Peabody Individual Achievement Test (PIAT). Significantly different scores are derived when WRAT norms are compared with PIAT norms, indicating that the tests are not interchangeable instruments for academic achievement. (RC)

When conducting a profile analysis of the Peabody Individual Achievement Test, only those subtests in which the subtest specific variance equals or exceeds 25 percent of the total variance and exceeds error variance should be considered for interpretation. Behavioral factors and testing conditions also should be considered. (Author/BEF)