This study determined the working memory (WM) components (executive, phonological loop, and visual-spatial sketchpad) that best predicted mathematical word problem-solving accuracy of elementary school children in Grades 2, 3, and 4 (N = 310). A battery of tests was administered to assess problem-solving accuracy, problem-solving processes, WM,…

This 3-year longitudinal study determined whether (a) subgroups of children with reading disabilities (RD) (children with RD only, children with both reading and arithmetic deficits, and low verbal IQ readers) and skilled readers varied in working memory (WM) and short-term memory (STM) growth and (b) whether growth in an executive system and/or a…

The working memory (WM) processes that underlie young children's (ages 6-8 years) mathematical precociousness were examined. A battery of tests that assessed components of WM (phonological loop, visual-spatial sketchpad, and central executive), naming speed, random generation, and fluency was administered to mathematically precocious and…

Examined whether age-related working memory deficits in learning disabled (LD) readers across four age groups (7, 10, 13, and 20) reflected retrieval efficiency or storage capacity problems. Found that LD readers' working memory performance was inferior to skilled readers' on verbal and visual-spatial working memory tasks across all ages.…

This study explored relationship between working memory (WM) and mathematical problem solving, comparing children with learning disabilities (LD) to chronologically age-matched and younger achievement-matched children on measures of WM, phonological processing, problem-solving, and word problem-solving accuracy. Found support for notion that…

Investigated the contribution of two working-memory systems (the articulatory loop and the central executive) to the performance differences between learning-disabled and skilled readers. Found that, compared to skilled readers, learning-disabled readers experienced constraints in the articulatory and long-term memory system, and suffered…

Examined whether writing and working memory (WM) were related to general or process-specific system, whether WM tasks operated independently of phonological short-term memory (STM), and whether WM predicted writing variance beyond that predicted by reading. Found a four-factor model reflecting phonological STM, verbal WM span, executive…

Investigated whether limitations in the enhancement of learning-disabled readers' working memory (WM) performance are attributable to process or storage functions. Found that: intercorrelations among diverse WP measures increased on demanding conditions; and verbal WM was not directly related to reading skill, supporting the notion that poor…

Investigates the extent to which learning disabled readers' atypical encoding relates to their deficiencies in semantic memory by comparing learning disabled and nondisabled readers in two age groups on dichotic listening tasks that included orienting and nonorienting instructions. (HOD)

Examined potential central processing strategy differences among subgroups of children on a series of elaborative encoding tasks. Children in lower verbal and learning ability subgroups differed from those in higher ability groups in how they shared, discriminated, and selectively allocated resources between recall tasks. (RH)

A total of 15 learning-disabled and 15 skilled readers viewed three groups of nonsense pictures (unnamed, name-nonassociated, and name-associated), then recalled them later. Results suggested learning disabled children's reading difficulties are due to an inability to activate a semantic representation that interconnects visual and verbal codes.…

Examines, in 9- and 12-year-olds, two theories of disabled readers' memory deficiencies. Subjects were compared on diotic and dichotic listening tasks for recall of semantically organized, phonemically organized, and categorically unrelated wordlists. Dependent measures included free recall, serial recall, recall organization, and hierarchical…

Investigated the effect of children's problem schemata and working memory span on the accuracy of children's solutions of arithmetic word problems. Results supported the hypothesis that the amount of working memory resources activated is independent of schemata activation, and indicated a weak relationship between memory and problem-solving…

Investigated how working memory differences between learning-disabled and nondisabled children reflect a specific or generalized deficit and whether limitations in enhancement of learning-disabled student's working memory performance are attributable to process or storage functions. Results suggest that learning-disabled suffer generalized working…