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Usability evaluation with screen reader users: a video presentation of the PCTA's experimental setting and rules
Stefano Federici1, Simone Borsci, Maria Laura Mele
1Department of Human and Education Sciences, University of Perugia, Perugia, Italy.
Cognitive Processing
|July 15, 2010
Summary
The partial concurrent thinking aloud (PCTA) technique improves web usability evaluations for screen reader users. This method overcomes limitations of traditional concurrent and retrospective protocols, ensuring better user involvement and assessment.
Area of Science:
- Human-Computer Interaction
- Accessibility Research
- Usability Engineering
Background:
- Traditional usability evaluation methods face challenges with screen reader users.
- Concurrent and retrospective protocols exhibit limitations and structural interference for blind users.
Purpose of the Study:
- Introduce and validate the Partial Concurrent Thinking Aloud (PCTA) technique.
- Enhance web usability evaluation for individuals using screen readers.
Main Methods:
- Developed and video-recorded the PCTA technique.
- Compared PCTA with concurrent and retrospective protocols using sighted and blind users.
- Visualized verbal protocols and user behavior differences.
Main Results:
- PCTA overcomes structural interference and limitations of concurrent/retrospective protocols for screen reader users.
- Videos demonstrate the advantages of PCTA over traditional methods.
- PCTA ensures a more user-driven usability assessment.
Conclusions:
- The PCTA technique offers a superior approach for usability evaluation with disabled users.
- PCTA effectively involves screen reader users, leading to more accurate assessments.
- This method promotes inclusive and effective human-computer interaction design.
