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Braithwaite, David W.; Sprague, Lauren; Siegler, Robert S. – Journal of Experimental Psychology: Learning, Memory, and Cognition, 2022
To explain children's difficulties learning fraction arithmetic, Braithwaite et al. (2017) proposed FARRA, a theory of fraction arithmetic implemented as a computational model. The present study tested predictions of the theory in a new domain, decimal arithmetic, and investigated children's use of conceptual knowledge in that domain. Sixth and…
Descriptors: Number Concepts, Numbers, Arithmetic, Fractions
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Wood, Carla L.; Schatschneider, Christopher; Hart, Sara – Reading & Writing Quarterly, 2020
This study aimed to describe 1-year changes in students' vocabulary in written narratives. Secondary aims included examination of accuracy and the relationship between lexical diversity and achievement. Participants included 749 students in first through eighth grades. Within-subjects 1-year change in diversity, productivity, and accuracy was…
Descriptors: Vocabulary Development, Elementary School Students, Middle School Students, Written Language
Braithwaite, David W.; Leib, Elena R.; Siegler, Robert S.; McMullen, Jake – Grantee Submission, 2019
Understanding fractions is critical to mathematical development, yet many children struggle with fractions even after years of instruction. Fraction arithmetic is particularly challenging. The present study employed a computational model of fraction arithmetic learning, FARRA (Fraction Arithmetic Reflects Rules and Associations; Braithwaite, Pyke,…
Descriptors: Individual Differences, Fractions, Arithmetic, Mathematics Instruction
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Bahr, Ruth Huntley; Silliman, Elaine R.; Danzak, Robin L.; Wilkinson, Louise C. – International Journal of Bilingual Education and Bilingualism, 2015
This study examined the Spanish and English spelling patterns of bilingual adolescents, including the cross-linguistic effects of each language, by applying a fine-grained measure to the differences in spelling in naturalistic writing. Spelling errors were taken from narrative and expository writing samples provided by 20 Spanish-English bilingual…
Descriptors: Bilingualism, Spelling, Expository Writing, Spanish