A new Stanford University study highlights how variations in brain activity influence not only mathematical abilities but also strategic problem-solving in children with developmental dyscalculia, suggesting a multi-faceted neurological basis for the condition.
A Stanford University study has found that differences in brain activity may help explain why some children with developmental dyscalculia struggle not only with arithmetic, but with deciding how to approach a maths problem in the first place. The research adds to a growing body of evidence that the condition is shaped by more than one weak point in the brain’s number-processing systems.
Writing in the Journal of Neuroscience, Oliver Lasnick and colleagues studied 68 children aged eight to 10 as they worked through problems using different strategies. The team found that activity in a specific brain system varied between children with developmental dyscalculia and those who were more skilled at choosing and adapting maths strategies. That activity also helped predict how well children counted and how easily they switched from one method to another.
The children with dyscalculia were slower to change strategy and less responsive when the difficulty of a problem shifted. They also appeared to use a range of approaches less efficiently and improved less over time at selecting the most suitable one. The researchers said those patterns point to difficulties not just with maths itself, but with the broader mental tools needed to manage attention, memory and flexible thinking.
The findings fit with earlier research suggesting that developmental dyscalculia is a multi-layered condition rather than a single deficit. Studies over the past two decades have linked it with weaknesses in spatial working memory, attention networks, executive function and brain regions involved in numerical processing. A 2022 systematic review also found that visuospatial working memory and symbolic number processing were among the strongest predictors of maths ability in children with dyscalculia, reinforcing the view that effective support may need to address several cognitive systems at once. Lasnick said the new work also underlined the wide variation seen among children with the condition, describing dyscalculia as a disorder that reflects cognitive and neural dysfunction across multiple processes.
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