Working memory capacity is a significant predictor of academic outcomes, specifically in mathematics and reading.

Sources and limits

Citation roles describe each study's relationship to this claim. Their counts do not measure evidence strength. This page reuses the published finding; it adds no new synthesis.

1. [1] Supports · 2017

   Do different types of executive function tests predict school success?

   Because the study was cross-sectional, it cannot prove that differences in executive functioning caused the differences in math or spelling achievement. The sample size was relatively small and consisted primarily of children from middle-class to high-socioeconomic families, meaning the findings might not apply to children from lower-income backgrounds or those with learning difficulties. Additionally, the study used non-verbal tasks to measure mental skills, which may underestimate the relationship between verbal executive functioning and spelling.

   Original paper

2. [2] Supports · 2014

   What mental skills help nine-year-olds do math?

   The study only looked at a single age group of children, meaning these findings might not apply to younger children who are still learning basic number associations. Because the design is cross-sectional and correlational, it cannot prove that training visual memory or spatial skills will directly cause a child's math scores to improve. Furthermore, the researchers noted that their spatial orientation test was not standardized, meaning its reliability was not officially established. Finally, the study grouped overall mathematical ability together rather than examining different mathematical domains, such as geometry or algebra, which might rely on different cognitive skills.

   Original paper

3. [3] Supports · 2014

   What cognitive skills predict reading ability?

   Because this study used a correlational design and tested participants at only a single time point, it cannot prove that cognitive deficits cause reading difficulties. The reading fluency and comprehension tasks relied on short sentences and passages, meaning the results might not generalize to how attention or working memory impacts the reading of longer, more complex texts. Additionally, attention control was assessed using parent questionnaires rather than direct, experimental measures of sustained attention.

   Original paper

4. [4] Supports · 2014

   How does executive function relate to early reading in Brazil?

   The study relied entirely on subjective teacher ratings of reading performance rather than standardized tests, which may introduce classroom bias. Additionally, because the study is cross-sectional, it cannot prove that working memory deficits cause reading struggles. Finally, the findings may not apply to clinical populations, as children with diagnosed learning disorders were excluded from the study.

   Original paper

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