Clock reading: an underestimated topic in children with mathematics difficulties

Recent studies have shown that children with mathematics difficulties (MD) have weaknesses in multiple areas of mathematics. Andersson (2008), for example, recently found that children with MD perform significantly worse than other children on clock reading tasks. The present study builds on this recent finding and aims at a more profound understanding of the difficulties that children with MD experience with telling time. Therefore, clock reading abilities of 154 children with MD were compared to the ability of 571 average achieving children and a qualitative error analysis was performed. The results of this study confirm the earlier finding of Andersson (2008) that children with MD perform worse on clock reading than average achieving children, and additionally shows that children with MD are especially struggling the combination of procedural and retrieval strategies that are needed to read complex five minute and one minute clock times. Children with MD make more errors that reflect immature counting strategies and deficits in memory retrieval. This finding is in line with Geary’s (2005) theory of subtypes in MD, that argues that children with MD have problems with mathematical procedures and semantic memory retrieval

Working memory in children with reading and/or mathematical disabilities

Elementary school children with reading disabilities (RD; n = 17), mathematical disabilities (MD; n = 22), or combined reading and mathematical disabilities (RD+MD; n = 28) were compared to average achieving (AA; n = 45) peers on working memory measures. On all working memory components, 2 (RD vs. no RD) x 2 (MD vs. no MD) factorial ANCOVAs revealed clear differences between children with and without RD. Children with MD had lower span scores than the AA children on measures of the phonological loop and the central executive. A significant interaction effect between RD and MD was found only for listening recall and had a small, partial effect size. In addition, analyses showed that the best logistic regression model consisted of a visuospatial and a central executive task. The model significantly distinguished between the AA and clinical groups and between the MD and RD+MD groups. Evidence was found for domain-general working memory problems in children with learning disabilities. Management of working memory loads in structured learning activities in the classroom, at home, or during therapy may help these children to cope with their problems in a more profound manner