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CHI
2010
ACM
14 years 5 months ago
Average task times in usability tests: what to report?
The distribution of task time data in usability studies is positively skewed. Practitioners who are aware of this positive skew tend to report the sample median. Monte Carlo simul...
Jeff Sauro, James R. Lewis
CHI
2011
ACM
13 years 2 months ago
More than skin deep: measuring effects of the underlying model on access-control system usability
In access-control systems, policy rules conflict when they prescribe different decisions (ALLOW or DENY) for the same access. We present the results of a user study that demonstr...
Robert W. Reeder, Lujo Bauer, Lorrie Faith Cranor,...
CHI
2008
ACM
14 years 26 days ago
Introducing item response theory for measuring usability inspection processes
Usability evaluation methods have a long history of research. Latest contributions significantly raised the validity of method evaluation studies. But there is still a measurement...
Martin Schmettow, Wolfgang Vietze
CHI
2008
ACM
14 years 11 months ago
Undercover: authentication usable in front of prying eyes
A number of recent scams and security attacks (phishing, spyware, fake terminals, ...) hinge on a crook's ability to observe user behavior. In this paper, we describe the des...
Hirokazu Sasamoto, Nicolas Christin, Eiji Hayashi
CHI
2007
ACM
14 years 11 months ago
Context & usability testing: user-modeled information presentation in easy and difficult driving conditions
A 2x2 enhanced Wizard-of-Oz experiment (N = 32) was conducted to compare two different approaches to presenting information to drivers in easy and difficult driving conditions. Da...
Jiang Hu, Andi Winterboer, Clifford Nass, Johanna ...