Original title: Uncovering latent cognitive, metacognitive, and neural bases of problem-solving deficits in children with developmental dyscalculia
O.H.M. Lasnick, Yunji Park, Percy Mistry, Vinod Menon · September 2026
Developmental dyscalculia, or DD, makes math problem-solving very difficult. Solving math problems requires both cognitive skills to carry out a method and metacognitive control, which is the awareness needed to choose the right strategy. Researchers studied how this brain-behavior link works by combining computer modeling with whole-brain scans. They discovered that children with DD struggle to execute all strategies, including counting, memory retrieval, and breaking problems into smaller parts. The children also show metacognitive struggles. They take longer to switch between methods, show less sensitivity to problem difficulty, and struggle to choose the best strategy. Brain scans across frontoparietal, hippocampal, and ventral-visual areas accurately distinguished children with DD from their peers. These brain patterns predicted counting efficiency and switching sensitivity. Crucially, the link between brain activity and behavior was reversed between groups: it was positive in typically developing children, but negative in children with DD, especially within the hippocampus.
Imagine a chef cooking a meal. Normally, the chef not only knows how to chop and stir, but also decides when to switch tasks based on how the food looks. Now suppose the chef is slow at chopping and also keeps chopping vegetables even after they are done, ignoring that the sauce is burning. Here, the children with dyscalculia are like that chef: they are slower at basic arithmetic steps (chopping) and also poor at deciding when to move to a better method (switching tasks). The brain scans showed that the same brain areas that help a good chef (typically developing children) actually get in the way of a struggling chef (children with dyscalculia).
This work shows that children with dyscalculia struggle not only with executing arithmetic strategies but also with choosing the right one, a metacognitive gap. It reveals that brain activity patterns in these children are reversed compared to typically developing peers, meaning the same neural signatures that help typical children hinder those with dyscalculia. This deepens our understanding of learning disabilities and opens pathways for targeted interventions that address both cognitive and metacognitive skills.
The study used a sample of 68 children aged 8-10, so findings may not generalize to other age groups. The cross-sectional design cannot establish whether neural differences cause the deficits or vice versa. The focus on arithmetic problem-solving may not capture all difficulties in dyscalculia. The reversal of brain-behavior correlations is a novel observation that needs replication.
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Uncovering latent cognitive, metacognitive, and neural bases of problem-solving deficits in children with developmental dyscalculia — O.H.M. Lasnick, Yunji Park, Percy Mistry et al. — Journal of Neuroscience — doi:10.1523/jneurosci.2200-25.2026
Abstract licence: CC BY
Explanation generated by Synthesis from the abstract — it is not the original paper.