This study explores the cognitive basis of reading disabilities (RDs) in Spanish-speaking children who are learning English as a second language. Children (N = 393) designated as English language learners (ELLs) or bilingual with and without RDs in Grades 1, 2, and 3 were administered a battery of cognitive (short-term memory, working memory,…

The role of working memory (WM) in children's growth in mathematical problem solving was examined in a longitudinal study of children (N = 127). A battery of tests was administered that assessed problem solving, achievement, WM, and cognitive processing (inhibition, speed, phonological coding) in Grade 1 children, with follow-up testing in Grades…

In this study, we explored whether the contribution of working memory (WM) to children's (N = 471) 2nd language (L2) reading and language acquisition was best accounted for by processing efficiency at a phonological level and/or by executive processes independent of phonological processing. Elementary school children (Grades 1, 2, & 3) whose 1st…

Improving reading rate can be difficult for poor readers. In this experiment, we investigated the impact of improvement in reading rate on other aspects of reading, including word recognition, decoding, vocabulary, and comprehension. Poor readers in Grades 2 or 4 (N = 123) were randomly assigned to 1 of 3 conditions: practice reading text at their…

This study explored the contribution of the phonological and executive working memory (WM) systems to 205 (102 girls, 103 boys, 6 to 9 years old) elementary school children's fluid and crystallized intelligence. The results show that (a) a 3-factor structure (phonological short-term memory [STM], visual-spatial WM, and verbal WM) was comparable…

The influence of cognitive growth in working memory (WM) on mathematical problem solution accuracy was examined in elementary school children (N = 353) at risk and not at risk for serious math problem solving difficulties. A battery of tests was administered that assessed problem solving, achievement, and cognitive processing (WM, inhibition,…

This study investigated growth in reading, vocabulary, and memory in children (ages 5 to 10) learning English as a second language identified at risk for reading disabilities (RD). A growth curve analysis showed that RD children were significantly below children not at risk in English and Spanish reading, Spanish short-term memory (STM), Spanish…

Cross-sectional and incremental age effects on cognitive processes that underlie individual differences in components of working memory (WM; phonological loop, visual-spatial sketchpad, executive processing) and mathematical problem-solving accuracy were examined in elementary school children. A battery of tests was administered that assessed…

The authors determined whether the cognitive processes that underlie second-language acquisition difficulties are the same as those that underlie reading difficulties. First-grade (N = 101) bilingual and nonbilingual children were administered a battery of measures in Spanish and English. English word identification and vocabulary were predicted…

This study identified cognitive processes that underlie individual differences in working memory (WM) and mathematical problem-solution accuracy in elementary school children at risk and not at risk for serious math difficulties (SMD). A battery of tests was administered that assessed problem solving, achievement, and cognitive processing in…

This study explored the contribution of two working memory (WM) systems to reading performance in younger and older children. Results showed significant age-related differences in verbal and visual-spatial WM performance were maintained when articulation speed and short-term memory were partialed from the analysis and that WM predicted age-related…

Correlations between phonological, orthographic, semantic, metacognitive, and working memory measures were studied for 40 learning-disabled students and 40 skilled readers ages 8 to 12. Results suggest that the cognitive processes that contribute to reading deficits are best understood in the context of their combination with other operations.…

Three experiments exploring the relationship of cognitive effort to the differences in word recall between skilled and learning disabled readers are described. Results suggest the amount of cognitive effort that can be effectively expended to produce a distinctive memory trace is related to individual differences in attentional capacity.…

Whether high levels of metacognitive knowledge about problem solving can compensate for low overall aptitude was studied for 31 high-aptitude and 25 low-aptitude children in grades 4 and 5. Results confirming superior performance of high metacognitive individuals are discussed in terms of the independence of metacognition and academic aptitude.…

Two experiments involving 227 children aged 5 to 18 years suggest that working memory operates as a general system independent of the subject's reading skill and that dynamic testing procedures enhance predictions of reading performance. Individual differences in working memory do not appear restricted to an academic domain. (SLD)