All May 2018: Volume 13, Issue 3 articles

Introduction to Volume 13, Issue 3

For our May 2018 issue, we start with an invited essay from Jeff Kelley on the origins of the Wizard of Oz (WoZ) prototyping methodology in the lab directed by one of the fathers of modern human factors engineering—Alphonse Chapanis.  Widely regarded as the originator of the WoZ method, in his essay, “Wizard of Oz […] [Read More]

Wizard of Oz (WoZ)—A Yellow Brick Journey

We’re off to see The Wizard. [Dorothy Gale and her posse] Since 1983, the term “Wizard of Oz” has come into common usage in the fields of Experimental Psychology, Human Factors, Ergonomics and Usability Engineering to describe a testing or iterative design methodology wherein an experimenter (the “Wizard”), in a laboratory setting, simulates the behavior […] [Read More]

Evaluation of Self-Trackers for Use in Telerehabilitation

Abstract The increasing prevalence of chronic heart failure requires new and more cost-efficient methods of chronic heart failure treatment. In the search for comprehensive and more cost-effective disease management, the use of self-monitoring devices has become increasingly popular. However, the usability of these wireless self-trackers needs to be evaluated if they are to be successfully […] [Read More]

Information Architecture (IA): Using Multidimensional Scaling (MDS) and K-Means Clustering Algorithm for Analysis of Card Sorting Data

Abstract We present a method for visualizing and analyzing card sorting data aiming to develop an in-depth and effective information architecture and navigation structure. One of the well-known clustering techniques for analyzing large data sets is with the k-means algorithm. However, that algorithm has yet to be widely applied to analyzing card sorting data sets […] [Read More]

Item Benchmarks for the System Usability Scale

Abstract From humble beginnings, the SUS has become a valuable tool in the toolkits of usability and user experience practitioners and researchers. We have developed regression equations that compute benchmarks for SUS items based on an overall SUS score. A review of the SUS literature on published benchmarks for the means of overall SUS scores […] [Read More]