The authors report data from a longitudinal study that addresses the relations between working memory capacity and reading comprehension skills in children aged 8, 9, and 11 years. At each time point, the authors assessed children's reading ability, vocabulary and verbal skills, performance on 2 working memory assessments (sentence-span and digit working memory), and component skills of comprehension. At each time point, working memory and component skills of comprehension (inference making, comprehension monitoring, story structure knowledge) predicted unique variance in reading comprehension after word reading ability and vocabulary and verbal ability controls. Further analyses revealed that the relations between reading comprehension and both inference making and comprehension monitoring were not wholly mediated by working memory. Rather, these component skills explained their own unique variance in reading comprehension

We report a longitudinal study investigating the predictors of reading comprehension and word reading accuracy between the ages of 7 to 8 (UK Year 3) and 10 to 11 years (Year 6). We found that different skills predicted the development of each. Reading comprehension skill measured in Year 3 was a strong predictor of comprehension in Year 6; vocabulary and verbal IQ also made significant unique contributions to the prediction of comprehension ability across time. Three comprehension components (inference, comprehension monitoring, and knowledge and use of story structure) emerged as distinct predictors of reading comprehension in Year 6, even after the autoregressive effect of comprehension was controlled. For word reading accuracy, early measures of word reading accuracy and phonemic awareness predicted later performance.

In this paper, we discuss the relative contribution of several theoretically relevant skills and abilities in accounting for variance in both word reading and text comprehension. We present data from the first and second waves of a longitudinal study, when the children were 7 to 8 years, and 8 to 9 years old. In multiple regression analyses, we show that there is a dissociation between the skills and abilities that account for variance in word reading, and those that account for variance in text comprehension. The pattern of results is very similar at both time points. Significant variance in comprehension skill is accounted for by measures of text integration, metacognitive monitoring, and working memory. By contrast, these measures do not account for variance in word reading ability, which was best accounted for by a phoneme deletion task. The implications of these findings for our understanding of the development of reading ability, children’s problems in text comprehension and for remediation will be discussed.

Two studies investigated the ability to use contextual information in stories to infer the meanings of novel vocabulary by 9-10-year-olds with good and poor reading comprehension. Across studies, children with poor reading comprehension were impaired when the processing demands of the task were greatest. In Study 2, working memory capacity was related to performance, but short-term memory span and memory for the literal content of the text were not. Children with poor reading comprehension were not impaired in learning novel vocabulary taught through direct instruction, but children with both weak reading comprehension and vocabulary were. Implications for the relation between vocabulary development and text comprehension are discussed