ERIC Number: EJ902952
Record Type: Journal
Publication Date: 2010-Nov
Abstractor: As Provided
Reference Count: 0
Stable Individual Differences in Number Discrimination in Infancy
Libertus, Melissa E.; Brannon, Elizabeth M.
Developmental Science, v13 n6 p900-906 Nov 2010
Previous studies have shown that as a group 6-month-old infants successfully discriminate numerical changes when the values differ by at least a 1:2 ratio but fail at a 2:3 ratio (e.g. 8 vs. 16 but not 8 vs. 12). However, no studies have yet examined individual differences in number discrimination in infancy. Using a novel numerical change detection paradigm, we present more direct evidence that infants' numerical perception is ratio-dependent even within the range of discriminable ratios and thus adheres to Weber's Law. Furthermore, we show that infants' numerical discrimination at 6 months reliably predicts their numerical discrimination abilities but not visual short-term memory at 9 months. Thus, individual differences in numerical discrimination acuity may be stable within the first year of life and provide important avenues for future longitudinal research exploring the relationship between infant numerical discrimination and later developing math achievement.
Descriptors: Infants, Visual Stimuli, Visual Discrimination, Numbers, Novelty (Stimulus Dimension), Short Term Memory, Individual Differences, Age Differences, Predictor Variables, Child Development
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
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