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Child Development1
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Langer, Jonas1
Rivera, Susan1
Smitsman, Ad W.1
Wakeley, Ann1
van Loosbroek, Erik1
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Can Young Infants Add and Subtract?
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Wakeley, Ann; Rivera, Susan; Langer, Jonas – Child Development, 2000
Used Wynn's (1992) procedure in 3 experiments to test 5-month-olds' looking-time reactions to correct and incorrect results of simple addition and subtraction transformations. Found non-systematic evidence of either imprecise or precise adding and subtracting in young infants. Results suggest that infants' reactions to displays of adding and…
Descriptors: Addition, Cognitive Development, Infant Behavior, Infants
Perception of Number Change in Infancy.
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van Loosbroek, Erik; Smitsman, Ad W. – 1987
Infants' visual perception of number change was investigated in three studies. These studies focused on infants' perception of events in which the total number of objects in a small group was changed through addition of another object. Involving 60 infants 5 months of age, Study I attempted to determine whether subjects perceived the properties in…
Descriptors: Addition, Foreign Countries, Habituation, Infant Behavior