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Psyridou, Maria; Torppa, Minna; Tolvanen, Asko; Poikkeus, Anna-Maija; Lerkkanen, Marja-Kristiina; Koponen, Tuire – Developmental Psychology, 2023
The aim of the present study was to examine the kinds of developmental profiles of arithmetic fluency skills that can be identified across Grades 1-9 (ages 7-16) in a large Finnish sample (n = 2,518). The study also examined whether membership in the developmental profiles could be predicted using a comprehensive set of kindergarten-age factors,…
Descriptors: Profiles, Arithmetic, Mathematics Skills, Elementary School Students
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Siegler, Robert S.; Pyke, Aryn A. – Developmental Psychology, 2013
We examined developmental and individual differences in 6th and 8th graders' fraction arithmetic and overall mathematics achievement and related them to differences in understanding of fraction magnitudes, whole number division, executive functioning, and metacognitive judgments within a cross-sectional design. Results indicated that the…
Descriptors: Grade 6, Arithmetic, Mathematics Skills, Mathematics Instruction
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Volbrecht, Michele M.; Goldsmith, H. Hill – Developmental Psychology, 2010
With a sample of 242 twins (135 girls, 107 boys) studied longitudinally, behavioral inhibition (BI) and inhibitory control (IC) measured at 3 years, as well as early and concurrent family process variables, were examined as predictors of shyness and of anxiety symptoms approximately 4 years later. Structured observational data from laboratory and…
Descriptors: Shyness, Inhibition, Children, Personality Traits