Can we really compare legibility and readability across different texts?

Design · Published 3 November 2026 Swipe more like this →

In short: This review shows how inconsistent definitions and variables make comparing legibility and readability difficult. A virtual lightning talk from 2019 highlights the need for clearer standards in instructional text design.

The study reveals that prior research on legibility and readability has lacked consistent definitions and clear variables, making replication and comparison across studies nearly impossible. The review focuses on typographic and substrate variables, such as font size, spacing, and paper quality, which can significantly affect how text is perceived. The author, Helen Hendaria Kamandhari, presents findings from an integrative review of 44 books, two websites, 83 journal articles, and four theses, emphasizing the need for standardized measurements to allow meaningful comparisons.

The analysis points out that assessing typography and material-related factors can involve either fixed or comparative figures, and unclear explanations can lead to misunderstandings when attempting to reproduce or evaluate findings between various investigations. This lack of comparability undermines the reliability of findings and hinders progress in instructional text design. The study concludes that a more unified approach is needed to ensure that future research can build on previous work effectively.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Readability isn't just about legibility—it's about making text feel effortless.
• Typography isn't decoration — it's the backbone of UX
• Web typography shapes more than just how text looks
• The barcode began as Morse code drawn in beach sand.
• Why Japan’s stop signs are triangles instead of octagons
• Can humans survive inside a giant, airtight glass bubble?
• A $60 million partnership renames a historic Arizona landmark
• Textiles are more than fabric; they are vessels for human identity
• One briefcase, 26 possibilities, and a mysterious voice in the skybox
• The 17-Million-Dollar Game That Sparked a Review-Fixing Scandal
• The modular engine that helped shape the modern gaming landscape
• From novice drag-and-drop to professional indie powerhouse

More in Readability · More in Design · Latest · A–Z · All topics