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Evidence of Numerical Estimation

Evidence of Numerical Estimation
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Description: Infants 6 months of age were habituated to a series of arrays of either 16 or 32 dots that varied in density, size, and shape of dots. They spent more time looking at an array size that differed from the array size they had seen during the habituation trials, indicating they could distinguish between sets differing in a 1:2 ratio.
Source: Xu, Spelke, & Goddard (2005), Experiment 1

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