Articles by James R. (Jim) Lewis, Ph.D

Dr. Lewis is a senior human factors engineer (at IBM since 1981). He has published influential papers in the areas of usability testing and measurement. His books include Practical Speech User Interface Design and (with Jeff Sauro) Quantifying the User Experience (now in its second edition).

Introduction to Volume 13, Issue 1

For our November 2017 issue, we start with an invited essay from Bill Gribbons on “Is It Time to Drop the ‘U’ (From UX)?”  In this thoughtful and provocative contribution, he argues for and considers the potential consequences of changing the way we refer to our field—specifically, changing from “User Experience” to “Experience Design.” In […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]

Can I Leave This One Out? The Effect of Dropping an Item From the SUS

Abstract There are times when user experience practitioners might consider using the System Usability Scale (SUS), but there is an item that just doesn’t work in their context of measurement. For example, the first item is “I think I would like to use this system frequently.” If the system under study is one that would […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]

Introduction to Volume 12, Issue 4

We are delighted to publish an editorial by Susan Hura titled “Usability Testing of Spoken Conversational Systems.” She provides valuable insights around the evaluation of voice interface systems. She describes specific issues around evaluating voice interfaces that are in an early stage of development, such as the use of “Wizard of Oz” testing. Her comprehensive […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]

Revisiting the Factor Structure of the System Usability Scale

Abstract In 2009, we published a paper in which we showed how three independent sources of data indicated that, rather than being a unidimensional measure of perceived usability, the System Usability Scale apparently had two factors: Usability (all items except 4 and 10) and Learnability (Items 4 and 10). In that paper, we called for […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]

Introduction to Volume 12, Issue 3, May 2017

For our May 2017 issue, Gerry Gaffney has contributed an editorial on “The Revolution Will Not Be Handheld.”  He provides a thoughtful essay about user experience research and design when there are no screens–think voice, Internet of Things, and robots. In addition to the editorial, this issue includes three research papers, two on variants of […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]

Introduction to Volume 12, Issue 2, February 2017

We are delighted to publish an editorial by Dr. Philip Kortum titled “Has Human Factors and Usability Lost Its Mojo?” In his editorial Kortum argues that our work user experience and human factors has not lived up to its potential. He provides many examples spanning web design, software, automotive, and medical fields where we as […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]

User Experience Rating Scales with 7, 11, or 101 Points: Does It Matter?

Abstract There is a large body of work on the topic of the optimal number of response options to use in multipoint items. The takeaways from the literature are not completely consistent, most likely due to variation in measurement contexts (e.g., clinical, market research, psychology) and optimization criteria (e.g., reliability, validity, sensitivity, ease-of-use). There is […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]

Introduction to Volume 12, Issue 1, November 2016

For our November issue, Dr. Jeff Sauro has contributed an editorial on “The Challenges and Opportunities of Measuring the User Experience.” Dr. Sauro provides a breakdown of the steps needed to start a corporate program in quantifying the user experience, including the identification of key performance indicators and identification of top tasks. He also addresses […] [Read More阅读详情자세히 읽기Leia mais続きを読むLeer más]