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Peer reviewedSamuel, J.; Bryant, P. – Journal of Child Psychology and Psychiatry, 1984
Findings that six-year-old children perform substantially better in a conservation of number task if they are asked one question instead of two were upheld when mass and volume materials were used and the age range of subjects was extended to include five- through eight-year-old children. (RH)
Descriptors: Age, Conservation (Concept), Foreign Countries, Numbers
Download full textTorner, Gunter – International Group for the Psychology of Mathematics Education, 2003
To probe beyond declarative knowledge about real numbers in secondary school, the authors interviewed students in Grades 9, 10 and 12. The main question seems to be whether the length of a decimal expansion is "indefinite" or "infinite." It blurs the mental representation of rational numbers as well. (Contains 3 footnotes.) [For complete…
Descriptors: Numbers, Grade 9, Cognitive Processes, Case Studies
