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Booth, Julie L.; Siegler, Robert S. – Child Development, 2008
This study examined whether the quality of first graders' (mean age = 7.2 years) numerical magnitude representations is correlated with, predictive of, and causally related to their arithmetic learning. The children's pretest numerical magnitude representations were found to be correlated with their pretest arithmetic knowledge and to be…
Descriptors: Pretests Posttests, Achievement Tests, Short Term Memory, Mathematics Skills
Booth, Julie L.; Siegler, Robert S. – Developmental Psychology, 2006
The authors examined developmental and individual differences in pure numerical estimation, the type of estimation that depends solely on knowledge of numbers. Children between kindergarten and 4th grade were asked to solve 4 types of numerical estimation problems: computational, numerosity, measurement, and number line. In Experiment 1,…
Descriptors: Individual Differences, Individual Development, Numbers, Computation