Articles by Claudia Ziegler Acemyan, PhD

Dr. Acemyan is an Adjunct Assistant Professor in the Department of Psychological Sciences at Rice University and the founding principal of Post Hoc, LLC, a human factors and safety consulting company. Her work focuses on issues like system/environment usability, safety, warnings, measurement and assessment tools, medical human factors, and user-centered system development.

SUSapp: A Free Mobile Application That Makes the System Usability Scale (SUS) Easier to Administer

Abstract The System Usability Scale (SUS), created by Brooke (1996), is a widely used measure to assess subjective usability. However, few digital tools have been created to help collect the required data and compute SUS scores, which rely upon a formula that is complex. The aim of the project was to develop an open-source iOS […] [Read More]

How Hard Can It Be to Place a Ballot Into a Ballot Box? Usability of Ballot Boxes in Tamper Resistant Voting Systems

Abstract End-to-end verifiable voting methods are an emerging type of voting system, and a number of new designs are being actively developed. Many of these systems try to mirror current paper voting methods and use a paper ballot that can be scanned and then placed into a ballot box. Previous research has shown that having […] [Read More]

How Low Can You Go? Is the System Usability Scale Range Restricted?

Abstract Previous research suggests that the System Usability Scale (SUS) might not be generating usability scores that span the entire measurement range from 0 to 100, particularly at the lower end of the scale. Most published literature has reported study mean scores that are typically above 40. The use of only a subset of the […] [Read More]