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Updated: Jun 5, 2026
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Eye-tracking to Distinguish Comprehension-based and Oculomotor-based Regressive Eye Movements During Reading
Published on: October 18, 2018
Eye movements, the perceptual span, and reading speed.
Keith Rayner1, Timothy J Slattery, Nathalie N Bélanger
1University of California, San Diego, La Jolla, CA, USA. krayner@ucsd.edu
Psychonomic Bulletin & Review
|December 21, 2010
Summary
Fast readers have a wider visual span during reading than slow readers. Font type and spacing did not significantly impact this perceptual span.
Area of Science:
- Cognitive Psychology
- Human-Computer Interaction
- Typography
Background:
- The perceptual span, the effective visual field during reading fixations, is crucial for reading efficiency.
- Understanding factors influencing the perceptual span can optimize reading interfaces and materials.
Purpose of the Study:
- To investigate how reading speed, font characteristics (fixed vs. proportional width), and intraword spacing affect the perceptual span.
- To identify optimal text configurations for reading.
Main Methods:
- Comparing the perceptual span of fast readers (approx. 330 wpm) and slow readers (approx. 200 wpm).
- Analyzing the impact of fixed-width versus proportional-width fonts.
- Evaluating the effects of normal versus reduced intraword spacing.
Main Results:
- Fast readers demonstrated a significantly larger perceptual span than slow readers.
- The perceptual span was not influenced by font type (fixed vs. proportional width).
- Font and intraword spacing exhibited notable effects on reading, with implications for text layout.
Conclusions:
- Reading speed is a primary determinant of perceptual span size.
- Text spacing and font design can be optimized to enhance reading efficiency, though font width itself is not a limiting factor.
- Findings inform the design of legible and efficient text for diverse reading contexts.
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