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Related Experiment Video

Updated: Jan 19, 2026

Using Looming Visual Stimuli to Evaluate Mouse Vision

Using Looming Visual Stimuli to Evaluate Mouse Vision

Published on: June 13, 2019

Aging Effects on the Visual Span for Alphabetic Stimuli.

Kayleigh L Warrington¹, Fang Xie², Jingxin Wang²

¹Department of Neuroscience, Psychology and Behaviour, University of Leicester , Leicester UK.

Experimental Aging Research

|September 14, 2019

Summary

This summary is machine-generated.

Older adults have a smaller visual span, recognizing fewer letters per glance than younger adults. This age-related difference in visual span may contribute to slower reading speeds in older age.

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Last Updated: Jan 19, 2026

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Published on: June 13, 2019

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Published on: May 6, 2009

Measuring Verbal Working Memory Span

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Published on: April 30, 2023

Area of Science:

Cognitive Psychology
Neuroscience
Human Aging Research

Background:

The visual span, the number of letters recognized in a single glance, is a key factor limiting reading speed.
Aging may affect visual span size, potentially contributing to age-related reading difficulties.

Purpose of the Study:

To investigate age-related differences in the visual span for alphabetic stimuli.
To determine if age-related changes in visual span contribute to reading speed decline in older adults.

Main Methods:

A trigram task was used to measure the visual span in young (18-30 years) and older (65+ years) adults.
Eye tracking ensured accurate central fixation during stimulus presentation.
Visual acuity and visual crowding were also assessed.

Main Results:

Older adults had significantly smaller visual spans (1.2 letters less on average) than young adults.
Both age groups exhibited smaller visual spans than previously reported.
Visual span size correlated with visual acuity and visual crowding measures.

Conclusions:

The visual span is reduced in older adults compared to younger adults.
This age-related reduction, though small, may impact parafoveal processing during reading.
Findings underscore the importance of controlling fixation location in visual span studies.