Abstract
In this paper are described data from a study of 10-yr.-old children's memory for simple addition facts and an investigation of the relationship between estimated automaticity and general mathematical ability. 21 children were each presented 100 single-digit addition combinations and their addition times analysed. Each child's automaticity for addition facts was estimated by considering the discrepancy between response times for tie and nontie combinations. Analysis indicated a significant correlation between automaticity and mathematical ability (r = .45, p< .01).
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