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Bliss, Beverly; Docherty, Edward M. – Child Study Journal, 1979
Descriptors: Adolescents, Concept Formation, Conservation (Concept), Elementary Secondary Education

Watson, Helen – Educational Studies in Mathematics, 1987
Discussed are the results of interviews with 63 Australian children (interviewed in English) and 62 Nigerian children (62 interviewed in English and 60 interviewed in Yoruba) to determine how they used number concepts in discussing five demonstrations manipulating physical matter. Differences between the two groups are considered. (RH)
Descriptors: Bilingual Students, Concept Formation, Conservation (Concept), Elementary Education

Ehindero, O. J. – Journal of Research in Science Teaching, 1982
The concepts of distance, area, and the coordinate reference systems were investigated in relation to the displacement volume task among 300 randomly selected primary and high school children in Nigeria. Although results support Piaget's hypothesis, a developmental lag of about two years was observed in Nigerian students. (JN)
Descriptors: Cognitive Development, Concept Formation, Conservation (Concept), Developmental Stages