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Direct linkBjarte Furnes; Åsa Elwér; Stefan Samuelsson; Rebecca Treiman; Richard K. Olson – Reading and Writing: An Interdisciplinary Journal, 2024
We investigated the stability and developmental interplay of word reading and spelling in samples of Swedish (N = 191) and U.S. children (N = 489) followed across four time points: end of kindergarten, grades 1, 2, and 4. Cross-lagged path models revealed that reading and spelling showed moderate to strong autoregressive effects, with reading…
Descriptors: Longitudinal Studies, Correlation, Reading Processes, Word Recognition
Olson, Richard K.; Keenan, Janice M.; Byrne, Brian; Samuelsson, Stefan – Scientific Studies of Reading, 2014
Modern behavior-genetic studies of twins in the United States, Australia, Scandinavia, and the United Kingdom show that genes account for most of the variance in children's reading ability by the end of the 1st year of formal reading instruction. Strong genetic influence continues across the grades, though the relevant genes vary for reading words…
Descriptors: Reading Skills, Skill Development, Child Development, Genetics
Szilagyi, Janka; Clements, Douglas H.; Sarama, Julie – Journal for Research in Mathematics Education, 2013
This study investigated the development of length measurement ideas in students from prekindergarten through 2nd grade. The main purpose was to evaluate and elaborate the developmental progression, or levels of thinking, of a hypothesized learning trajectory for length measurement to ensure that the sequence of levels of thinking is consistent…
Descriptors: Elementary School Mathematics, Thinking Skills, Cognitive Processes, Young Children
