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Poor performance on serial visual tasks in persons with reading disabilities: impaired working memory?
Ronit Ram-Tsur1, Miriam Faust, Ari Z Zivotofsky
1Bar-Ilan University, Ramat-Gan, Israel. ronitram@netvision.net.il
Journal of Learning Disabilities
|September 5, 2008
Summary
Persons with reading disabilities (PRD) struggle with tasks requiring significant working memory, impacting reading skills. Visual sequence tasks may help identify working memory deficits in PRD.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Developmental Psychology
Background:
- Reading disabilities, including dyslexia, are complex conditions affecting numerous cognitive processes.
- Working memory plays a crucial role in reading comprehension and sequential processing.
- Understanding the specific cognitive deficits in persons with reading disabilities (PRD) is essential for targeted interventions.
Purpose of the Study:
- To investigate the performance of PRD on sequential visual-comparison tasks with varying working memory demands.
- To explore the mediating relationships between sequential visual processing, attention, and memory skills in PRD.
- To determine if visual sequence tasks can serve as indicators for working memory deficits in PRD.
Main Methods:
- Participants: Persons with reading disabilities (PRD) and normally achieving readers (NAR).
- Tasks: Sequential visual-comparison tasks with controlled working memory loads and presentation rates.
- Analyses: Performance comparisons between groups, correlation analyses, and mediation modeling to examine relationships between task performance and cognitive skills.
Main Results:
- PRD performed significantly worse than NAR on tasks with higher working memory demands, independent of presentation rate.
- Strong correlations were found between performance on high working memory demand tasks and reading-related skills.
- Mediation analysis suggested that visual sequence memory may precede verbal working memory, with order judgment tasks mediating this relationship.
Conclusions:
- Poor working memory abilities are strongly associated with reading disabilities and may be a core deficit in dyslexia.
- Visual sequential comparison tasks, particularly those with higher working memory loads, show potential for identifying working memory impairments in PRD.
- These findings suggest a potential role for visual sequence memory in the broader working memory system relevant to reading.
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