The Naglieri Nonverbal Ability Test, Second Edition (NNAT2), is used widely to screen students for possible inclusion in talent development programs. The NNAT2 claims to provide a more culturally neutral evaluation of general ability than tests such as Form 6 of the Cognitive Abilities Test (CogAT6), which has Verbal and Quantitative batteries in…

This paper presents a systematic review of published data on the performance of sub-Saharan Africans on Raven's Progressive Matrices. The specific goals were to estimate the average level of performance, to study the Flynn Effect in African samples, and to examine the psychometric meaning of Raven's test scores as measures of general intelligence.…

The predictive validity of symptom criteria for different subtypes of ADHD among children who were impaired in at least one setting in early childhood was examined. Academic achievement was assessed seven times over 8 years in 125 children who met symptom criteria for ADHD at 4-6 years of age and in 130 demographically-matched non-referred…

This paper reports on a longitudinal study designed to assess the progress made by UK foreign language undergraduate students during the residence abroad (RA) component of their degree. The article first of all places the study within the international research context, and then describes the data collation procedures and methodology employed. It…

Part of a special issue on adaptive behavior, the article reviews adaptive behavior research in areas which include the relationship between adaptive behavior and intelligence and school achievement, relationship between different measures of adaptive behavior, predictive aspects, declassification, group differences in adaptive behavior,…