Types of problems elicited by verbal protocols for blind and sighted participants

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Verbal protocols are often used in user-based studies of interactive technologies. This study investigated whether different types of problems are revealed by concurrent and retrospective verbal protocols (CVP and RVP) for blind and sighted participants. Eight blind and eight sighted participants undertook both CVP and RVP on four websites. Overall, interactivity problems were significantly more frequent in comparison to content or information architecture problems. In addition, RVP revealed significantly more interactivity problems than CVP for both user groups. Finally, blind participants encountered significantly more interactivity problems than sighted participants. The findings have implications for which protocol is appropriate, depending on the purpose of a particular study and the user groups involved.
Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Computers Helping People with Special Needs
Publication statusPublished - 13 Jul 2016

Publication series

NameLecture Notes in Computer Science

Bibliographical note

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  • User-based studies concurrent verbal protocol retrospective verbal protocol usability accessibility blind users

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