IBM computer usability satisfaction questionnaires: psychometric evaluation and instructions for use
International Journal of Human-Computer Interaction
Correlations among prototypical usability metrics: evidence for the construct of usability
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Groupthink: usability of secure group association for wireless devices
Proceedings of the 12th ACM international conference on Ubiquitous computing
Readers behaving badly: reader revocation in PKI-based RFID systems
ESORICS'10 Proceedings of the 15th European conference on Research in computer security
When designing usability questionnaires, does it hurt to be positive?
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
ACM Transactions on Information and System Security (TISSEC)
Exploring the impact of cultures on web usability test
HCD'11 Proceedings of the 2nd international conference on Human centered design
Usability issues for an aerospace digital library
Proceedings of the International Working Conference on Advanced Visual Interfaces
Dragimation: direct manipulation keyframe timing for performance-based animation
Proceedings of Graphics Interface 2012
Semi-automated magazine layout using content-based image features
Proceedings of the 20th ACM international conference on Multimedia
Journal of Visual Languages and Computing
SlideWiki: elicitation and sharing of corporate knowledge using presentations
EKAW'12 Proceedings of the 18th international conference on Knowledge Engineering and Knowledge Management
EKAW'12 Proceedings of the 18th international conference on Knowledge Engineering and Knowledge Management
Evaluation of a social web-based telehealth system
Proceedings of the 24th Australian Computer-Human Interaction Conference
The voice user help, a smart vehicle assistant for the elderly
UCAmI'12 Proceedings of the 6th international conference on Ubiquitous Computing and Ambient Intelligence
Panoinserts: mobile spatial teleconferencing
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
CHI '13 Extended Abstracts on Human Factors in Computing Systems
UMUX-LITE: when there's no time for the SUS
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
MTi: A method for user identification for multitouch displays
International Journal of Human-Computer Studies
Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services
TiNYARM: Awareness of Research Papers in a Community of Practice
Proceedings of the 13th International Conference on Knowledge Management and Knowledge Technologies
Video collections in panoramic contexts
Proceedings of the 26th annual ACM symposium on User interface software and technology
Augmented manufacturing: a study with impaired persons on assistive systems using in-situ projection
Proceedings of the 6th International Conference on PErvasive Technologies Related to Assistive Environments
Assisted living solutions for the elderly through interactive TV
Multimedia Tools and Applications
Evaluating a query framework for software evolution data
ACM Transactions on Software Engineering and Methodology (TOSEM) - Testing, debugging, and error handling, formal methods, lifecycle concerns, evolution and maintenance
An online social-networking enabled telehealth system for seniors: a case study
AUIC '13 Proceedings of the Fourteenth Australasian User Interface Conference - Volume 139
The usability perception scale (UPscale): a measure for evaluating feedback displays
DUXU'13 Proceedings of the Second international conference on Design, User Experience, and Usability: design philosophy, methods, and tools - Volume Part I
Photoportals: shared references in space and time
Proceedings of the 17th ACM conference on Computer supported cooperative work & social computing
Touching annotations: A visual metaphor for navigation of annotation in digital documents
International Journal of Human-Computer Studies
User-aided reader revocation in PKI-based RFID systems
Journal of Computer Security - ESORICS 2010
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Since its introduction in 1986, the 10-item System Usability Scale (SUS) has been assumed to be unidimensional. Factor analysis of two independent SUS data sets reveals that the SUS actually has two factors --- Usable (8 items) and Learnable (2 items --- specifically, Items 4 and 10). These new scales have reasonable reliability (coefficient alpha of .91 and .70, respectively). They correlate highly with the overall SUS (r = .985 and .784, respectively) and correlate significantly with one another (r = .664), but at a low enough level to use as separate scales. A sensitivity analysis using data from 19 tests had a significant Test by Scale interaction, providing additional evidence of the differential utility of the new scales. Practitioners can continue to use the current SUS as is, but, at no extra cost, can also take advantage of these new scales to extract additional information from their SUS data. The data support the use of "awkward" rather than "cumbersome" in Item 8.