Individual differences in children's writing: A function of working memory or reading or both processes?

The purpose of this study was to investigate whether a general or specific working memory (WM) system is related to writing and whether individual differences in reading and/or processing efficiency underlie the correlations between WM and writing. Two studies correlated WM with writing (Test of Written Language-TOWL) and reading measures. In Study 1, WM was correlated significantly with a number of writing measures, particularly to those measures related to text generation. Working-memory also contributed unique variance to writing, beyond what is predicted by reading comprehension. Study 2 compared the correlations of verbal and visual-spatial WM measures with the TOWL under initial and enhanced memory processing (dynamic assessment) conditions. The coefficients were statistically comparable between initial and enhanced processing conditions, suggesting that individual differences in processing efficiency do not account for the correlations between WM and writing. Overall, the results indicated that (a) WM measures contribute unique variance to writing, especially text generation, and (b) working memory performance improves under gain conditions, but this enhanced processing efficiency did not appear to mediate the links between WM and writing. Taken together, the two studies support a general capacity explanation for the relationship between working memory and text generation.     

How does morphosyntactic skill contribute to different genres of Chinese writing from grades 3 to 6?

This 4‐year longitudinal study examined the extent to which morphological awareness, syntactic processing, working memory (WM) and reading skills predict unique variances developmentally in three genres of Chinese writing (narration, argumentation and exposition) among 246 young Mandarin‐speaking children. Hierarchical regression analyses were conducted using the writing performance of three genres at the fourth year as the dependent variables. After controlling for reading skills and WM, morphological awareness was uniquely associated with all three types of writing genres longitudinally, while syntactic processing made a significant longitudinal contribution to narrative and argumentative writing during the earlier years. With the autoregressive effect of writing controlled, WM was uniquely associated with narrative writings across all four years, and with argumentative and expository writing in the later years. Reading skills were uniquely related to concurrent narrative and expository writing.     

The Influence of Working Memory on Reading and Creative Writing Processes in a Second Language

The present study tested both the processing and storage of functions of working memory (WM) and whether WM in low-order and high-order writing processes follows the same pattern as in reading. The influence of WM on creative writing was also tested. Forty-seven high school students participated in this study. A test of written language was administered to the subjects, comprising the following subtests spelling, vocabulary, style, logical sentence, sentence combining, thematic maturity, contextual vocabulary, syntactic maturity, contextual spelling, contextual style. A WM reading comprehension test was also conducted. The overall findings of the study indicate significant relationships between WM measures and reading and writing in English as a second language.     

Developmental trends for object and spatial working memory: a psychophysiological analysis

This study examined developmental trends in object and spatial working memory (WM) using heart rate (HR) to provide an index of covert cognitive processes. Participants in 4 age groups (6-7, 9-10, 11-12, 18-26, n=20 each) performed object and spatial WM tasks, in which each trial was followed by feedback. Spatial WM task performance reached adult levels before object WM task performance. The differential developmental trends for object and spatial WM found in this study are taken to suggest that these WM components are separable. Negative performance feedback elicited HR slowing that was more pronounced for adults than for children. The development of performance monitoring as indexed by covert HR slowing following performance feedback contributes to WM performance.     

Working Memory and Children’s Mathematical Skills: Implications for mathematical development and mathematics curricula

This study examined the contributions of the different components of the working memory (WM) model to a range of mathematical skills in children, using measures of WM function that did not involve numerical stimuli. A sample of 148 children (78 Year 3, mean age 8 years and 1 month, and 70 Year 5 pupils, mean age 9 years and 10 months) completed WM measures and age‐appropriate mathematics tests designed to assess four mathematical skills defined by the National Curriculum for England. Visuo‐spatial sketchpad and central executive, but not phonological loop, scores predicted unique variance in children’s curriculum‐based mathematical attainment but the relative contributions of each component did not vary much across the different skills. Subsequently, the mathematics data were re‐analysed using cluster analysis and new performance‐related mathematics factors were derived. All three components of WM predicted unique variance in these performance‐related skills, but revealed a markedly distinct pattern of associations across the two age groups. In particular, the data indicated a stronger role for the visuo‐spatial sketchpad in the younger children’s mathematics performance. We discuss our findings in terms of the importance of WM in the development of early mathematical ability.     

Which components of working memory are important in the writing process?

This study investigated the relationship between components of working memory (WM) and the macrostructure (e.g., planning, writing, and revision) and microstructure (e.g., grammar, punctuation) of writing. A battery of WM and writing measures were administered to 160 high-school students. Overall, hierarchical regression analyses showed that the central executive component of WM significantly predicted planning, writing, and revision as well the majority of microstructure measures. The results further validate the importance of WM in the writing process, but indicate that writing process is more intricately tied to the controlled attention component of WM when compared to storage of information.

Additive and multiplicative effects of working memory and test anxiety on mathematics performance in grade 3 students

The aim of this study was to investigate the interplay between test anxiety and working memory (WM) on mathematics performance in younger children. A sample of 624 grade 3 students completed a test battery consisting of a test anxiety scale, WM tasks and the Swedish national examination in mathematics for grade 3. The main effects of test anxiety and WM, and the two-way interaction between test anxiety and WM on mathematics performance, were modelled with structural equation modelling techniques. Additionally, the effects were also tested separately on tasks with high WM demands (mathematical problem-solving) versus low WM demands (basic arithmetic). As expected, WM positively predicted mathematics performance in all three models (overall mathematics performance, problem-solving tasks, and basic arithmetic). Test anxiety had a negative effect on problem-solving on the whole sample level but concerning basic arithmetic only students with lower WM were affected by the negative effects of test anxiety on performance. Thus, students with low WM are more vulnerable to the negative effects of test anxiety in low WM tasks like basic arithmetic. The results are discussed in relation to the early identification of test anxiety.     

Working memory resources in children: stability and relation to subsequent academic skills

This study aimed to investigate the extent to which WM measured in kindergarten predicts WM measured in second grade (stability of individual WM progress) and the extent to which WM measured at kindergarten predicts academic performance at second grade (N?=?94). The results showed that WM skills significantly increase during the time span from Finnish kindergarten to second grade. Verbal (VWM) and visuospatial WM (VSWM) resources seem to develop quite independently, whereas individual progress showed some stability. WM resources measured just before the start of formal school predicted later academic performance and VWM acted as more powerful predictor than VSWM resources. The results have two important educational implications: first, an individual or group-based intervention designed to enhance children’s WM skills would be most important even before the start of school, and second, poor WM skills should be addressed when planning the learning environment beginning in kindergarten.     

Dynamic testing, working memory, and reading comprehension growth in children with reading disabilities

This longitudinal study assessed (a) whether performance changes in working memory (WM) as a function of dynamic testing were related to growth in reading comprehension and (b) whether WM performance among subgroups of children with reading disabilities (RD; children with RD only, children with both reading and arithmetic deficits, and low verbal IQ readers) varied as a function of dynamic testing. A battery of memory and reading measures was administered to 78 children (11.6 years) across three testing waves spaced 1 year apart. WM tasks were presented under initial and dynamic testing conditions (referred to as gain and maintenance testing). The important results were that (a) WM performance as a function of maintenance testing was a significant moderator of growth in reading comprehension and (b) WM performance of children with RD was statistically comparable within subgroups of RD but inferior to that of skilled readers across all testing conditions. The results support the notion that children's WM performance under dynamic testing conditions was related to the rate of growth in reading comprehension but unrelated to subgroup differences in reading.     

The role of the working memory and language skills in the prediction of word problem solving in 4- to 7-year-old children

The aim of this study was to analyse the role of verbal and visuo-spatial working memory (WM) and language skills (vocabulary, listening comprehension) in predicting preschool and kindergarten-aged children’s ability to solve mathematical word problems presented orally. The participants were 116 Finnish-speaking children aged 4–7?years. The results showed that verbal WM (VWM) did not have a direct effect on word problems in young children but was indirectly related to word problems through vocabulary and listening comprehension. These results suggest that in young children, VWM resources support language skills which, furthermore, contribute to variation in solving orally presented word problems. The results also showed that visuo-spatial WM had a direct effect on performance in word problems, suggesting that it plays an important role in word problem solving among this age group.     

Working Memory and School Achievement in the Ninth Form

Two experiments explored the relationship between 15‐16‐year‐old ninth‐formers’ working memory (WM) capacity and school achievement. In the first experiment, WM capacity was measured administering complex WM span tests on 107 subjects. These measures correlated highly significantly with performance in four school subjects: mathematics, foreign language, Finnish (native language) and geography. In the second experiment, additional WM tasks were used to measure two WM components: the phonological loop and the central executive component as suggested by Baddeley (1986). The tasks that were assumed to measure the central executive were strongly linked to performance in school subjects. Maximally, they shared 31 % of the variance with school achievement. Partial correlations showed that digit span correlated, independently of the central executive measures, with performance in foreign language. This result suggested that the phonological loop is specifically related to foreign language learning. The relationship between WM and the general intelligence factor g is discussed.     

工作记忆与口译关系研究综述

在现有的文献中,关于工作记忆与口译间存在怎样的关系仍存在不少分歧。文章梳理了译员的工作记忆优势和工作记忆对口译绩效的作用两方面的研究。总体来看,理论层面上,已有研究对工作记忆的概念、口译过程及其背后的认知机制的认识比较模糊;实证层面上,前人在研究(实验)设计上还存在一定不足,如各研究间选取的被试及工作记忆测量任务存在较大差异。因此,工作记忆与口译关系的研究需要深化对工作记忆以及口译过程的认识,并且需要不断地完善研究设计,以求更为客观准确地反映工作记忆与口译之间的关系。     

Reasoning and working memory as predictors of school grades

The present paper contributes to individual difference research in the field of working memory (WM) and reasoning and their contribution to the prediction of real-life criteria. Therefore, a broad WM test battery, a well-established measure of reasoning, and school grades were applied. It is argued that abilities as assessed with the WM component coordination are relevant for good performances at school, especially for science courses. The verbal task of the WM component storage in the context of processing was assumed to be relevant for the prediction of performance in language courses. As expected, reasoning turned out to be the best predictor of school grades. However, it was also confirmed that variance shared by coordination and reasoning can explain school performance, especially as concerns science courses. The verbal storage in the context of processing task significantly accounted for variance in language courses above and beyond reasoning. Thus, the present study provided further insights into the differential validity of different WM components.     

State anxiety and working memory in children: A test of processing efficiency theory

This study investigated the effect of individual differences in state anxiety on tasks tapping the central executive, phonological, and visuo‐spatial components of working memory (WM). It was designed to test Eysenck and Calvo’s processing efficiency theory (PET) which suggests that the phonological and executive components of WM may be important in understanding learning outcomes in anxiety. Typically‐developing children aged 9–10 years were split into high and low state anxiety groups. They performed three WM tasks – forward and backward digit span (assumed to measure phonological and central executive components of WM respectively) and a spatial working memory task (measuring the visuo‐spatial component of WM). Measurements of task accuracy were taken as an indicator of performance outcome or effectiveness. Time taken to complete tasks and a subjective rating of mental effort were taken as measurements of performance efficiency. No differences were found between high and low state anxiety groups in task accuracy for any measure. Children in the high state anxiety group, however, took longer to complete the backward digit span task and reported increased mental effort in the forward digit span task, indicating some effect of anxiety on measures of performance efficiency.     

Fluid/spatial and crystallized intelligence in relation to domain-specific working memory: A latent-variable approach

Fluid/spatial intelligence, crystallized intelligence and their relationships to verbal and visuospatial working memory (WM) were studied. A total of 120 Finnish Air Force recruits participated in this study. Fluid/spatial intelligence was assessed using four different tasks, while crystallized intelligence was defined with the help of test scores of Finnish upper secondary school National Matriculation Tests in three different academic subjects and one additional Verbal Relations task. Complex WM span tasks were used to measure visuospatial and verbal WM capacities. Structural equation modeling indicated that verbal WM was related to crystallized intelligence when both WM tasks were included in the model, whereas performance on the visuospatial WM task was related to fluid/spatial intelligence, but not to crystallized intelligence. Verbal WM was not related to fluid intelligence when used as a single WM predictor. The results indicate that verbal WM might be related to verbal ability and learning at school, while visuospatial WM is relatively strongly related to nonverbal reasoning and spatial visualization. The current results further suggest that WM capacity is not a unitary system.     

Does strategy knowledge influence working memory in children with mathematical disabilities?

This study investigated the relationship between working memory (WM), declarative strategy knowledge, and math achievement in children with and without mathematical disabilities (MD). Experiment 1 examined the relationship between strategy knowledge, verbal WM, and visual-spatial WM in children with MD as a function of initial, gain, and maintenance conditions. The results showed that after partialing the influence of reading, stable strategy choices rather than specific strategy knowledge was related to verbal and visual-spatial WM span in high demand (maintenance) conditions. Experiment 2 compared children with MD to a group of chronological age-matched children and a group of math ability-matched children on the same conditions as Experiment 1. Age-matched children's verbal and visual-spatial WM performance was superior to that of children with MD, whereas WM performance was statistically comparable between children with MD and younger children matched on math ability. The selection of expert strategies was related to high WM span scores in the initial conditions. After controlling for reading achievement in a regression analysis, verbal and visual-spatial WM, stable verbal strategy choices, and expert strategy choices related to visual-spatial processing all contributed independent variance to math achievement. Overall, these results suggest that WM and math achievement are related to strategy knowledge.     

Mapping the Trajectory of Socioeconomic Disparity in Working Memory: Parental and Neighborhood Factors

Working memory (WM) is positively correlated with socioeconomic status (SES). It is not clear, however, if SES predicts the rate of WM development over time or whether SES effects are specific to family rather than neighborhood SES. A community sample of children (n = 316) enrolled between ages 10 and 13 completed four annual assessments of WM. Lower parental education, but not neighborhood disadvantage, was associated with worse WM performance. Neither measure of SES was associated with the rate of developmental change. Consequently, the SES disparity in WM is not a developmental lag that narrows or an accumulating effect that becomes more pronounced. Rather, the relation between family SES and WM originates earlier in childhood and is stable through adolescence.     

A subgroup analysis of working memory in children with reading disabilities: domain-general or domain-specific deficiency?

The purpose of this study was to investigate whether changes in working memory (WM) of children with reading disabilities (RD) were related to a domain-specific or a domain-general system. Based on Daneman and Carpenter's (1980) Sentence Listening Span task, children were subgrouped into a group of high executive processing (high listening span) children without RD, a group of low executive processing (low listening span) children with RD, and a group of children with and without RD matched on executive processing (moderate listening span). Subgroups were compared on phonological, visual-spatial, and semantic WM tasks across initial (no probes or cues), gain (cues that bring performance to an asymptotic level), and maintenance conditions (asymptotic conditions without cues). The results showed that (a) children without RD high in executive processing ability outperformed all other subgroups, (b) the RD subgroup low in executive processing performed poorly relative to all other subgroups across task and memory conditions, (c) children with and without RD matched on executive processing were comparable in WM span and changes in WM for all tasks, and (d) WM performance of children with RD was a strong linear function of the high executive processing group, suggesting that the nature or the specific componential makeup of the tasks are not the main contributors to WM performance. Taken together, the results suggest that a domain-general system may partially contribute to poor WM in children with RD, and that this system may operate independently of their reading deficits.     

Writing through retellings: an exploratory study of language-impaired and dyslexic populations

This study was designed to examine differences and similarities in the writing of 15 language-impaired, 17 dyslexic and 15 typically developing control subjects matched on chronological age. Subjects ranging in age from 11 to 21 years were required to produce a written language sample using an expository text-retell procedure. The writing of these groups was compared on eight variables across discourse, T-unit, sentence, and word levels. Control subjects performed better than language-impaired and dyslexic subjects on all writing variables. Dyslexic subjects showed better performance than the language-impaired subjects on several variables including, (a) number of T-units, (b) number of ideas, (c) total number of words, and (4) number of different words while showing comparable performance on percentage of spelling and production of grammatically correct sentences. These findings support Bishop and Snowling’s [Psychol. Bull. 130 (2004) 858] position that the differences between these two clinical populations exist in the non-phonological dimensions of language.