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Haman, Maciej; Lipowska, Katarzyna – Developmental Science, 2021
People tend to underestimate subtraction and overestimate addition outcomes and to associate subtraction with the left side and addition with the right side. These two phenomena are collectively labeled 'operational momentum' (OM) and thought to have their origins in the same mechanism of 'moving attention along the mental number line'. OM in…
Descriptors: Preschool Children, Arithmetic, Attention, Spatial Ability

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