TY - GEN
T1 - Accessibility or Usability of the User Interfaces for Visually Impaired Users? A Comparative Study
AU - Khowaja, Kamran
AU - Al-Thani, Dena
AU - Aqle, Aboubakr
AU - Banire, Bilikis
N1 - Publisher Copyright:
© 2019, Springer Nature Switzerland AG.
PY - 2019
Y1 - 2019
N2 - The use of the Internet to search and browse information has increased in the recent past from the younger children to adults and older adults with or without any disability. The access to the information is becoming more common through the use of mobile apps as it is ubiquitous. This requires an evaluation to ensure that it can be used by everyone including people with disability. However, there is no generic set of guidelines or heuristics that can be used by anyone to evaluate an interface in terms of usability and accessibility. This paper provides expert evaluation of two apps i.e. Accessible Qatar and LinkedIn using a set of heuristics by Gómez and colleagues, and Web Content Accessibility Guidelines (WCAG) 2.0 in terms of both usability and accessibility evaluation. The data analysis was carried out based on the usability problems and the opinion of experts using the system usability scale (SUS) questionnaire. The usability problems were analysed based on the number of usability problems found and the average severity ratings of the usability problems. The results show that the most frequently violated heuristics from the usability heuristics are visibility and recognition. The average severity rating of all the problems found using usability heuristics set is a mix of both minor and major. The results also show that the most frequently violated WCAG 2.0 guideline alternatives; the average severity rating of all the problems found using WCAG 2.0 guidelines is major.
AB - The use of the Internet to search and browse information has increased in the recent past from the younger children to adults and older adults with or without any disability. The access to the information is becoming more common through the use of mobile apps as it is ubiquitous. This requires an evaluation to ensure that it can be used by everyone including people with disability. However, there is no generic set of guidelines or heuristics that can be used by anyone to evaluate an interface in terms of usability and accessibility. This paper provides expert evaluation of two apps i.e. Accessible Qatar and LinkedIn using a set of heuristics by Gómez and colleagues, and Web Content Accessibility Guidelines (WCAG) 2.0 in terms of both usability and accessibility evaluation. The data analysis was carried out based on the usability problems and the opinion of experts using the system usability scale (SUS) questionnaire. The usability problems were analysed based on the number of usability problems found and the average severity ratings of the usability problems. The results show that the most frequently violated heuristics from the usability heuristics are visibility and recognition. The average severity rating of all the problems found using usability heuristics set is a mix of both minor and major. The results also show that the most frequently violated WCAG 2.0 guideline alternatives; the average severity rating of all the problems found using WCAG 2.0 guidelines is major.
KW - Accessibility guidelines
KW - Heuristic evaluation
KW - Interface evaluation
KW - Mobile heuristic
KW - Visually impaired user
KW - Web Content Accessibility Guidelines (WCAG)
UR - http://www.scopus.com/inward/record.url?scp=85069824841&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-23560-4_20
DO - 10.1007/978-3-030-23560-4_20
M3 - Conference contribution
AN - SCOPUS:85069824841
SN - 9783030235598
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 268
EP - 283
BT - Universal Access in Human-Computer Interaction. Theory, Methods and Tools - 13th International Conference, UAHCI 2019, Held as Part of the 21st HCI International Conference, HCII 2019, Proceedings
A2 - Antona, Margherita
A2 - Stephanidis, Constantine
PB - Springer Verlag
T2 - 13th International Conference on Universal Access in Human-Computer Interaction, UAHCI 2019, held as part of the 21st International Conference on Human-Computer Interaction, HCI International 2019
Y2 - 26 July 2019 through 31 July 2019
ER -