Prevalence rates of cognitive impairment in persons 75 to 85 years of age have been documented in the range of 10-15%, and exceeding 20% after age 85. A recent study has demonstrated even higher prevalence rates: 18.7% between the ages of 75-84 and 47% in persons over 85 years of age. Screening for dementia in persons 75 years of age and older…

Compares the performance of learning disabled students on the WISC-R and the Tests of Cognitive Abilities from the Woodcock-Johnson Psycho-Educational Battery. This study finds that learning disabled subjects performed more poorly on the Tests of Cognitive Abilities than on the WISC-R. (Author)

The purpose of this study was to design a prototype written test of cognitive development based on the model of Piaget. Although the results were not consistent with Piaget's theory, test development was only partially successful. Specifically, validation of the scales was excellent or poor depending on the perspective. Analysis of the item…

Describes and analyzes the social organization of testing as an interactional phenomenon. Provides examples of exchanges between clinician and child in a diagnostic testing situation. States these coorientational activities demonstrate that testing has an interactional basis. Explores the implications for research on bias in mental testing. (NL)

Explored the relationship between high school students' (N=37) performances on the Tomlinson-Keasey and Campbell paper-and-pencil test of formal operations and a set of traditional, individually administered, Piagetian developmental tasks. Correlations between the traditional, formal operations tasks and paper-and-pencil tests were low. (Author/DS)