A recent study from Stanford University has revealed significant differences in the brains of children with dyslexia, particularly in a region known as the visual word form area (VWFA). This area, crucial for recognizing written words, is either smaller or absent in many children with dyslexia. The findings, published in Nature Communications in December 2025, highlight how targeted reading interventions can help close this gap.
The research, led by Jason Yeatman, Ph.D., and graduate student Jamie Mitchell, involved functional magnetic resonance imaging (fMRI) scans of children aged 7 to 13. The study included 44 participants diagnosed with dyslexia who underwent an intensive reading intervention, compared with a control group of 43 children without the intervention, which included both dyslexic and typically developing readers.
Dyslexia, affecting an estimated 5% to 10% of the population, presents significant challenges in learning to read. Children with this condition often struggle with recognizing letters and their sounds, spelling, and phonemic awareness. The study emphasizes that while effective tutoring can improve reading skills, it remains essential for educators to understand the underlying brain development differences in dyslexic children.
Identifying Brain Differences
Before the intervention, brain scans revealed that nearly all typical readers had a detectable VWFA. In contrast, fewer than two-thirds of the children with dyslexia showed evidence of this brain region. “One of our key questions was, ‘Is the VWFA different in those with dyslexia?'” Yeatman noted. “We have a very clear and resounding ‘Yes.’ In children with persistent reading struggles, this critical area involved in rapid word recognition is either missing or significantly smaller.”
Among those with a detectable VWFA, children with dyslexia had smaller regions compared to their peers. The research linked the size of the VWFA to reading ability, indicating that children with a smaller VWFA tended to have poorer reading skills. Furthermore, the neural response observed during reading was less pronounced in dyslexic children, suggesting that their brains process written language differently.
Impact of Reading Intervention
Following the initial scans, the children with dyslexia who participated in the reading intervention showed marked improvements. Over eight weeks, they advanced in their reading skills by approximately one grade level. The intervention allowed researchers to detect the VWFA in more dyslexic children. In contrast, the detection rate among those who did not receive tutoring remained unchanged.
Yeatman remarked, “It’s as if evidence-based intervention builds this region in the dyslexic brain.” The VWFA also increased in size among those who completed the reading program. However, even after significant improvements in reading scores, dyslexic children still exhibited smaller VWFAs on average compared to typical readers.
The findings indicate that while tutoring can enhance reading abilities, the underlying brain differences may persist. Yeatman explained that the VWFA is plastic, meaning it can adapt and grow through experience, particularly when children engage in effective reading interventions. This raises further questions about the most effective strategies to support children with dyslexia, especially since many continue to face challenges even after receiving assistance.
The research underscores the importance of tailored educational strategies for children with dyslexia and the potential for brain changes through targeted interventions. As Yeatman concluded, “Many kids with dyslexia, even as their reading improves, have persistent struggles. This brain difference may be at the root of those continued challenges.”
This groundbreaking study not only provides insights into the neurological aspects of reading disabilities but also emphasizes the critical role of informed educational practices in fostering literacy among children with dyslexia.
