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The maximum number of non-spatial visual items (e.g., letters, symbols, digits) that can be reliably and simultaneously identified in a single, brief fixation without the need for eye movements.
read more about visual attention span ...A smaller VAS is associated with reading difficulties, as it limits the number of letters or words that can be processed and encoded during each fixation while reading.
VAS is closely related to the capacity of visual working memory but focuses specifically on the simultaneous parallel processing of visual input.
Typically measured using a whole report task, where the observer is briefly flashed a sequence of items and asked to recall as many as possible.
Yes. A wide attention span allows a reader to process several letters or even a small word during one fixation, increasing reading speed and fluency.
No. Visual attention span is about simultaneous intake and processing; short-term memory is about storage and sequential rehearsal.
Yes. Certain cognitive and perceptual training techniques are designed to expand the span of attention, improving reading performance.