Cognitive Abilities Test (CogAT) is one of the most frequently used gifted identification tools. In this meta-analytic study, we investigated empirical evidence of the validity of CogAT, in relation to different types of instruments. After reviewing 1,480 studies, a total of 24 with 33 effect sizes were included in the meta-analysis. According to…

As a result of the upcoming Federal reauthorization of the Individuals With Disabilities Education Improvement Act (IDEA), practitioners and researchers have begun vigorously debating what constitutes evidence-based assessment for the identification of specific learning disability (SLD). This debate has resulted in strong support for a method that…

The Delis-Kaplan Executive Function System (D-KEFS; Delis, Kaplan, & Kramer, 2001a) is a set of standardized tests for comprehensively assessing higher-level cognitive functions, referred to as "executive functions," in both children and adults (aged 8 to 89). Executive functions draw on the individual's more fundamental or primary cognitive…

Twenty-two children with mild mental retardation, 27 children with learning disabilities, and 49 nondisabled peers (ages 4-5) were presented with a battery of eight cognitive tasks being considered for inclusion in a new screening test. Results found the components measured different cognitive tasks and led to accurate individual classification…

This study developed a normative core profile taxonomy of the four scholastic aptitude and corresponding achievement scales of the Woodcock-Johnson Psycho-Educational Battery (Revised). Cluster analysis was used to sort 2,620 students from the standardization sample. Results of internal and external validity analyses provided support for eight…