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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
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Siegler, Robert S.; Booth, Julie L. – Child Development, 2004
Two experiments examined kindergartners', first graders', and second graders' numerical estimation, the internal representations that gave rise to the estimates, and the general hypothesis that developmental sequences within a domain tend to repeat themselves in new contexts. Development of estimation in this age range on 0-to-100 number lines…
Descriptors: Age Differences, Mathematics Achievement, Achievement Tests, Elementary School Mathematics