Studies have shown that visual perception is a critical factor for reading comprehension and arithmetic computation in separate research lines with different visual form perception measures.
A study by Cui et al. (2019) of 1099 Chinese elementary school students investigated whether the same visual form perception (assessed by a geometric figure matching task) underlies both reading comprehension and arithmetic computation.
The results showed that visual form perception had close relations with both reading comprehension and arithmetic computation, even after controlling for age, gender, and cognitive factors such as processing speed, attention, working memory, visuospatial processing, and general intelligence.
Results also showed that visual form perception fully accounted for numerosity comparison’s relations with reading comprehension and arithmetic computation. These results suggest that reading comprehension and arithmetic computation might share a similar visual form processing mechanism.