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Cognitive development
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==== Numbers ==== Evidence suggests that humans utilize two core systems for number representation: approximate representations and precise representations. The approximate number system helps to capture the relationship between quantities by estimating numerical magnitudes. This system becomes more precise with age. The second system helps to precisely monitor small groups (limited to around 3 for infants) of individual objects and accurately represent those numerical quantities.<ref>Feigenson, L., Dehaene, S., & Spelke, E. (2004). [https://www.harvardlds.org/wp-content/uploads/2017/01/feigenson2004-1.pdf Core systems of number]. ''TRENDS in Cognitive Sciences'', ''8''(7), 308.</ref>
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