Journal Article10.1007/S10339-009-0347-Y
Web usability evaluation with screen reader users: implementation of the partial concurrent thinking aloud technique.
TL;DR: The result suggests that PCTA allows to overcome the structural interference and the limits of concurrent and retrospective protocols when used with screen reader users, and reduces the efficiency difference of usability evaluation between blind and sighted users.
read more
Abstract: A verbal protocol technique, adopted for a web usability evaluation, requires that the users are able to perform a double task: surfing and talking. Nevertheless, when blind users surf by using a screen reader and talk about the way they interact with the computer, the evaluation is influenced by a structural interference: users are forced to think aloud and listen to the screen reader at the same time. The aim of this study is to build up a verbal protocol technique for samples of visual impaired users in order to overcome the limits of concurrent and retrospective protocols. The technique we improved, called partial concurrent thinking aloud (PCTA), integrates a modified set of concurrent verbalization and retrospective analysis. One group of 6 blind users and another group of 6 sighted users evaluated the usability of a website using PCTA. By estimating the number of necessary users by the means of an asymptotic test, it was found out that the two groups had an equivalent ability of identifying usability problems, both over 80%. The result suggests that PCTA, while respecting the properties of classic verbal protocols, also allows to overcome the structural interference and the limits of concurrent and retrospective protocols when used with screen reader users. In this way, PCTA reduces the efficiency difference of usability evaluation between blind and sighted users.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Usability evaluation methods for the web: A systematic mapping study
TL;DR: A systematic mapping study was performed to assess the UEMs that have been used by researchers to evaluate Web applications and their relation to the Web development process, which provided a framework in which new research activities can be more appropriately positioned and from which useful information for novice usability practitioners can be extracted.
546
•Proceedings Article
CHI '07 Extended Abstracts on Human Factors in Computing Systems
Mary Beth Rosson,David Gilmore +1 more
- 28 Apr 2007
TL;DR: This year's CHI program committee was extremely serious and careful in making CHI paper and note decisions, with many submissions receiving multiple discussions, before and during the program committee meetings.
118
Assistive technology assessment handbook
Stefano Federici,Marcia J. Scherer +1 more
- 26 Mar 2012
TL;DR: A model for assessing Individual Functioning and Disability and the Role of Speech-Language Pathologists in Assistive Technology Assessments, and a review of existing and new approaches.
85
Usability Evaluation : Models , Methods , and Applications
Stefano Federici,Simone Borsci +1 more
- 01 Jan 2010
TL;DR: This work discusses the relation between usability and accessibility as dimensions of the intrasystemic relation between the user and technology, by proposing a definition and a model of evaluation.
The Accessibility of Data Visualizations on the Web for Screen Reader Users: Practices and Experiences During COVID-19
Dan Fan,Hrishikesh V. Rao,Gene S-H Kim,Xavier Vazquez,Lucy Greco,Sile O'Modhrain,Sean Follmer +6 more
TL;DR: Observations during this critical period of time provide an understanding of the widespread accessibility issues encountered across online data visualizations, the impact that data accessibility inequities have on the BVI community, the ways screen reader users sought access to data-driven information and made use of online visualizations to form insights, and the pressing need to make larger strides towards improving data literacy, building confidence, and enriching methods of access.
References
Protocol Analysis: Verbal Reports as Data.
TL;DR: This article reviewed major advances in verbal reports over the past decade, including new evidence on how giving verbal reports affects subjects' cognitive processes, and on the validity and completeness of such reports.
6.6K
A framework for representing knowledge
Marvin Minsky
- 01 Jun 1974
TL;DR: The enormous problem of the volume of background common sense knowledge required to understand even very simple natural language texts is discussed and it is suggested that networks of frames are a reasonable approach to represent such knowledge.
Some Experiments on the Recognition of Speech, with One and with Two Ears
TL;DR: In this paper, the relation between the messages received by the two ears was investigated, and two types of test were reported: (a) the behavior of a listener when presented with two speech signals simultaneously (statistical filtering problem) and (b) behavior when different speech signals are presented to his two ears.