Designing for usability: key principles and what designers think
Communications of the ACM
Classifying users: a hard look at some controversial issues
CHI '86 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
A comparison of input devices in element pointing and dragging tasks
CHI '91 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The invisible computer
Software for use: a practical guide to the models and methods of usage-centered design
Software for use: a practical guide to the models and methods of usage-centered design
Testing pointing device performance and user assessment with the ISO 9241, Part 9 standard
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
A Practical Guide to Usability Testing
A Practical Guide to Usability Testing
The obstacles and myths of usability and software engineering
Communications of the ACM - The Blogosphere
Differences in pointing task performance between preschool children and adults using mice
ACM Transactions on Computer-Human Interaction (TOCHI)
Remote usability evaluations With disabled people
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Facial feature tracking for cursor control
Journal of Network and Computer Applications
Current practice in measuring usability: Challenges to usability studies and research
International Journal of Human-Computer Studies
Improvements in vision-based pointer control
Proceedings of the 8th international ACM SIGACCESS conference on Computers and accessibility
Drag-and-drop errors in young children's use of the mouse
Interacting with Computers
Heuristic evaluation: Comparing ways of finding and reporting usability problems
Interacting with Computers
User performance with trackball-mice
Interacting with Computers
Building up usability-engineering capability by improving access to automated usability evaluation
Interacting with Computers
Hands-free vision-based interface for computer accessibility
Journal of Network and Computer Applications
Experiences using a hands-free interface
Proceedings of the 10th international ACM SIGACCESS conference on Computers and accessibility
Fitts' law as a research and design tool in human-computer interaction
Human-Computer Interaction
Comparison of techniques for matching of usability problem descriptions
Interacting with Computers
Movement and Recovery Analysis of a Mouse-Replacement Interface for Users with Severe Disabilities
UAHCI '09 Proceedings of the 5th International on ConferenceUniversal Access in Human-Computer Interaction. Part II: Intelligent and Ubiquitous Interaction Environments
Assessment of the use of a human-computer vision interaction framework
HSI'09 Proceedings of the 2nd conference on Human System Interactions
ERCIM'06 Proceedings of the 9th conference on User interfaces for all
Creation of an ergonomic guideline for supervisory control interface design
EPCE'07 Proceedings of the 7th international conference on Engineering psychology and cognitive ergonomics
FaceMouse: a human-computer interface for tetraplegic people
ECCV'06 Proceedings of the 2006 international conference on Computer Vision in Human-Computer Interaction
Comparison of video-based pointing and selection techniques for hands-free text entry
Proceedings of the International Working Conference on Advanced Visual Interfaces
CHI '13 Extended Abstracts on Human Factors in Computing Systems
Proceedings of the 6th International Conference on PErvasive Technologies Related to Assistive Environments
A low-cost 3D human interface device using GPU-based optical flow algorithms
Integrated Computer-Aided Engineering
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When we develop an input device for users to communicate with computers, we have to take into account that end-users must consider the utilization of the device to be effective, efficient and satisfactory. Users whose expectations are unmet by the interface will tend to abandon it. In this paper we present a vision-based interface for motor-impaired users; a multidisciplinary group developed this interface. The user's preferences are a critical issue when selecting an access device; therefore, user requirements should be included in the design. Usability evaluation should be integrated into relevant phases of software development. In order to evaluate the design, we present a process with multiple user studies at different development stages. We describe the combination of a development project and its implementation, with user experience considerations embedded in the process. Finally, we studied the performance of the interface through several tests, paying special attention to satisfaction and fatigue. From our results we observed that although several users found the interface tiring, their satisfaction level was encouraging, suggesting the interface is usable.