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Wilkey, Eric D.; Shanley, Lina; Sabb, Fred; Ansari, Daniel; Cohen, Jason C.; Men, Virany; Heller, Nicole A.; Clarke, Ben – Developmental Science, 2022
Children's ability to discriminate nonsymbolic number (e.g., the number of items in a set) is a commonly studied predictor of later math skills. Number discrimination improves throughout development, but what drives this improvement is unclear. Competing theories suggest that it may be due to a sharpening numerical representation or an improved…
Descriptors: Numbers, Mathematics Skills, Predictor Variables, Number Concepts
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Smyth, Rachael E.; Ansari, Daniel – Developmental Science, 2020
Research demonstrating that infants discriminate between small (e.g., 1 vs. 3 dots) and large numerosities (e.g., 8 vs. 16 dots) is central to theories concerning the origins of human numerical abilities. To date, there has been no quantitative meta-analysis of the infant numerical competency data. Here, we quantitatively synthesize the evidential…
Descriptors: Infants, Visual Perception, Visual Stimuli, Numeracy
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Sokolowski, H. Moriah; Merkley, Rebecca; Kingissepp, Sarah Samantha Bray; Vaikuntharajan, Praja; Ansari, Daniel – Developmental Science, 2022
Which dimension of a set of objects is more salient to young children: number or size? The "Build-A-Train" task was developed and used to examine whether children spontaneously use a number or physical size approach on an un-cued matching task. In the Build-A-Train task, an experimenter assembles a train using one to five blocks of a…
Descriptors: Young Children, Task Analysis, Numbers, Knowledge Level
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Hutchison, Jane E.; Ansari, Daniel; Zheng, Samuel; De Jesus, Stefanie; Lyons, Ian M. – Developmental Science, 2020
A long-standing debate in the field of numerical cognition concerns the degree to which symbolic and non-symbolic processing are related over the course of development. Of particular interest is the possibility that this link depends on the range of quantities in question. Behavioral and neuroimaging research with adults suggests that symbolic and…
Descriptors: Kindergarten, Numbers, Cognitive Processes, Young Children
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Lyons, Ian M.; Price, Gavin R.; Vaessen, Anniek; Blomert, Leo; Ansari, Daniel – Developmental Science, 2014
Math relies on mastery and integration of a wide range of simpler numerical processes and concepts. Recent work has identified several numerical competencies that predict variation in math ability. We examined the unique relations between eight basic numerical skills and early arithmetic ability in a large sample (N = 1391) of children across…
Descriptors: Predictor Variables, Elementary School Students, Grade 1, Grade 2
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Bugden, Stephanie; Ansari, Daniel – Developmental Science, 2016
In the present study we examined whether children with Developmental Dyscalculia (DD) exhibit a deficit in the so-called "Approximate Number System" (ANS). To do so, we examined a group of elementary school children who demonstrated persistent low math achievement over 4 years and compared them to typically developing (TD), aged-matched…
Descriptors: Learning Disabilities, Children, Spatial Ability, Short Term Memory
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Van Herwegen, Jo; Ansari, Daniel; Xu, Fei; Karmiloff-Smith, Annette – Developmental Science, 2008
Previous studies have suggested that typically developing 6-month-old infants are able to discriminate between small and large numerosities. However, discrimination between small numerosities in young infants is only possible when variables continuous with number (e.g. area or circumference) are confounded. In contrast, large number discrimination…
Descriptors: Toddlers, Infants, Number Concepts, Numeracy