The development of strategy use in elementary school children: Working memory and individual diVerences

The current study tested the development of working memory involvement in children’s arithmetic strategy selection and strategy eYciency. To this end, an experiment in which the dual-task method and the choice/no-choice method were combined was administered to 10to 12-year-olds. Working memory was needed in retrieval, transformation, and counting strategies, but the ratio between available working memory resources and arithmetic task demands changed across development. More frequent retrieval use, more eYcient memory retrieval, and more eYcient counting processes reduced the working memory requirements. Strategy eYciency and strategy selection were also modiWed by individual diVerences such as processing speed, arithmetic skill, gender, and math anxiety. Short-term memory capacity, in contrast, was not related to children’s strategy selection or strategy eYciency. © 2006 Elsevier Inc. All rights reserved.