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Boyer, Ty W.; Levine, Susan C. – Journal of Experimental Child Psychology, 2012
The current experiments examined the role of scale factor in children's proportional reasoning. Experiment 1 used a choice task and Experiment 2 used a production task to examine the abilities of kindergartners through fourth-graders to match equivalent, visually depicted proportional relations. The findings of both experiments show that accuracy…
Descriptors: Scaling, Measures (Individuals), Mathematical Concepts, Task Analysis
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Geary, David C.; Hoard, Mary K.; Byrd-Craven, Jennifer; DeSoto, M. Catherine – Journal of Experimental Child Psychology, 2004
Groups of first-grade (mean age = 82 months), third-grade (mean age = 107 months), and fifth-grade (mean age = 131 months) children with a learning disability in mathematics (MD, n=58) and their normally achieving peers (n = 91) were administered tasks that assessed their knowledge of counting principles, working memory, and the strategies used to…
Descriptors: Grade 1, Grade 5, Learning Disabilities, Memory