Enhancing mobile e-book usability for the visually impaired: A novel model validated via the fuzzy delphi method

Current usability evaluation models for e-books do not adequately address the needs of the visually impaired, as they require customisation to effectively evaluate these applications, considering the unique accessibility requirements of the visually impaired and the distinct features of e-books. Thi...

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Bibliographic Details
Published in:Journal of King Saud University. Computer and information sciences Vol. 37; no. 7; pp. 179 - 24
Main Authors: Matraf, Munya Saleh Ba, Hashim, Nor Laily, Hussain, Azham, Habbal, Adib, Hamouda, Hassen, Ghazali, Osman
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01.09.2025
Springer Nature B.V
Springer
Subjects:
Accessibility
Adaptive technology
Computer Imaging
Computer Science
Database Management
Delphi method
Designers
E-book
E-books
Fuzzy Delphi Method
Literature reviews
Machine Learning
Mobile applications
Original Paper
Pattern Recognition and Graphics
Software Engineering/Programming and Operating Systems
Systems and Data Security
Theory of Computation
Usability
User experience
Vision
Visual impairment
Visually impaired
Fuzzy Delphi Method
Visually impaired
Mobile applications
Accessibility
Usability
E-book
ISSN:1319-1578, 2213-1248, 1319-1578
Online Access:Get full text
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Summary:Current usability evaluation models for e-books do not adequately address the needs of the visually impaired, as they require customisation to effectively evaluate these applications, considering the unique accessibility requirements of the visually impaired and the distinct features of e-books. This study presents a structured three-phase approach to developing a usability evaluation model specifically designed for mobile e-book applications used by the visually impaired. The first phase involved gathering requirements through a literature review and online survey. The second phase focused on verifying the proposed model using the Fuzzy Delphi Method. The final phase involved consolidating the verified measurements to establish the usability evaluation model. Five usability factors were identified: accessibility, satisfaction, effectiveness, learnability, and efficiency. The inclusion of accessibility ensures that the needs of the visually impaired are addressed. Besides, 31 usability metrics were validated through FDM. The findings confirm the applicability of the proposed model by demonstrating systematic expert agreement on the identified factors and metrics. The Fuzzy Delphi Method validates 31 usability metrics, thereby strengthening the reliability and applicability of HCI and accessibility research. This model promotes inclusive technology development, supporting the creation of usable and empowering e-book applications for users who are visually impaired.
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ISSN:1319-1578
2213-1248
1319-1578
DOI:10.1007/s44443-025-00180-6