A study by the University of Trento, carried out in collaboration with UniSR, identified some elements that improve readability:
- Character size - the greater the character, the more legible the text is.
- Alignment of the text on the left (not centered or justified)
- Use of headings or titles that give an indication of the content of the paragraph
- Line spacing - the larger the line spacing, the more the text is readable.
The research group, coordinated by Dr. Michele Scaltritti of the Department of Psychology and Cognitive Sciences of the University of Trento and by Dr. Simone Sulpizio, UniSR researcher at the Faculty of Psychology and Center of Neurolinguistics and Psycholinguistics, carried out a series of experiments involving about 80 participants, adults and children of middle schools. Among them, both typical readers and readers with dyslexia. Participants were asked to read some internet pages selected from the web, heterogeneous in appearance and typographical features. Their eye movements were recorded during reading.
The results of this analysis show that different typographic characteristics influence the readability of the texts. Aligning the text on the left, using headers or using a larger font are elements that can help all types of readers. Still other elements - such as the type of font used or the use of highlights such as bold or italics - do not appear to have any impact on the readability of the texts.
In general, the study indicates that the simple manipulation of some features of the appearance of the internet pages - a simple and economic operation - can be sufficient to improve the readability of the texts. An improvement that is often found in different types of readers: more or less experienced, typical or with dyslexia.
Dr. Sulpizio concludes:
"This is why the application of these improvements can contribute to the creation of more inclusive texts, accessible to all users. The recommendations contained in the study are particularly useful to those who fill out the guidelines for the accessibility of web content and to those who produce digital texts”.