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Vos, Peter G. – International Journal of Behavioral Development, 1978
Derives two models for conceptualizing figure similarities from Piaget's developmental theory of spatial reference systems. An experiment on a two alternative forced-choice similarity matching task revealed age differences in observer dependence among children and young adults. Concludes that some Euclidian space concepts are achieved as formal…
Descriptors: Abstract Reasoning, Cognitive Development, College Students, Elementary School Students