The general objective of this study was to study Piaget's notion of the sequential development of number conservation in 85 children averaging 5.9 years of age. The question addressed was to determine if a set of ten equal addition conservation of number tasks were scalable. A large coefficient of reproducibility, .912, was computed. Other indices…

The purpose of this study was to determine (1) whether the development of combinatorial schema as defined by Piaget is dependent on, or independent of, instruction, and (2) whether or not a prescribed treatment compatible with contemporary learning theories can develop the combinatorial operational abilities of students who are in a transitional…

Forty-two volunteer subjects, mostly young adults, participated in developing a methodology for studying cognitive processes and cerebral lateral functions in relation to individual cognitive styles and age. Four test batteries were developed and refined in this study: the adult cognitive, the adult electroencephalogram (EEG), the children's…

Eighty subjects 4, 6, 8, and 10 years of age inductively identified partially uncovered silhouettes of three simple pictures. Subjects removed as few as possible covering pieces, according to their own strategies, to correctly name the pictures. Performance generally improved with increased age on the two dependent measures, inductively inferring…

Questionnaire results from l04 psychologists serving the blind and partially sighted indicated disagreement on the tests used and on the evaluation of these tests. Tests of all kinds from 45 publishers were rated, and appropriate ages and populations (blind, partially-sighted) were suggested. (CP)