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Goldman, Ronald J.; Goldman, Juliette D. G. – Child Development, 1982
A sample of 838 children ages 5 through 15 years in Australia, England, North America, and Sweden were interviewed about physical and sexual development. The study covers essentially the same area as Bernstein and Cowan (1975) but extends the sample on the dimensions of age, number, randomness, and comparisons made. (Author/RH)
Descriptors: Adolescents, Children, Comparative Analysis, Concept Formation

Halford, Graeme S.; And Others – Developmental Psychology, 1986
Reports on a study in which children aged 7 to 9 years and 11 to 13 years were asked to judge which one out of three wooden blocks would float, given weight and volume information for each block relative to a block that was known to float. Indicates that judgments may have been based on the size-weight illusion. (HOD)
Descriptors: Cognitive Development, Concept Formation, Elementary School Students, Elementary Secondary Education