Correlational analysis of distinct contributions and overlaps between visual, visual attention, and perceptual spans

The visual span, the visual attention span and the perceptual span are defined within specific theoretical frameworks. Each framework uses different measurement methods that reflect specific visual processes. All three are commonly associated with reading skills, and they are often confused or overlapped in the literature. For the first time, these three spans have been assessed in the same participants and under the same methodological conditions, enabling a more accurate comparison to be made. Correlations between the spans and with control tasks confirm certain peculiarities but also reveal some similarities. Reading ability correlates significantly with each span. However, only the perceptual span explains a specific part of the variance in adult reading speed.