Discusses the logical discontinuity between object and personal knowledge. Proposes an extension of Piaget's subject-object equilibrium to a dialogic situation between an ego and an alter. Suggests that this structural model provides a scheme by which differences in adulthood between adaptive and maladaptive cognitive change can be clarified.…

This study with 22 adults with mild to moderate mental retardation examined the nature of knowledge structures in this population as well as effects of presentation methods and response methods on ability to classify items. Results indicated major effects for disability severity, insignificant findings for presentation method, and a trend toward…

Focuses on use of computer-drawn faces to explore visualization in learning and for presenting multivariate data. Prior and new research are reviewed and future applications are discussed. "Autocorrelation-face," a graphics representation created from mathematical analysis of voice input, and its potential as a learning aid for the deaf are…