Change-point detection had its origins almost sixty years ago in the work of Page, Shiryayev, and Lorden, who focused on sequential detection of a change-point in an observed process. The process was typically a model for the measured quality of a continuous production process, and the change-point indicated a deterioration in quality that must be detected and corrected. Recently, motivation fr...

As Director of the Office of Scientific Research and Development, Dr. Vannevar Bush has coordinated the activities of some six thousand leading American scientists in the application of science to warfare. In this significant article he holds up an incentive for scientists when the fighting has ceased. He urges that men of science should then turn to the massive task of making more accessible o...

Research Question: How do participants behave when asked to rate objects’ visual dimensions? Approach: Qualitative Data Analysis Method: 90 participants were asked to rate 11 objects located along a route of 1.1 km length and asked to explain their rating behaviour using a think-aloud protocol. Results: If asked to rate several objects, participants tend to stop reading the questions as a whole...

The paper proposes an approach to comparative usability evaluation that incorporates important relevant criteria identified in previous work. It applies the proposed approach to a case study of a comparative evaluation of an academic website employing four widely-used usability evaluation methods (UEMs): heuristic evaluation, cognitive walkthroughs, think-aloud protocol and co-discovery learning.

To explore the issue of culture in persuasive technology, we identified strategies distinguishing individualist or collectivist audiences, and developed two versions of a prototype game. In this paper we report on a qualitative study of this game. The game concerned smoking cessation, and was set in a New Zealand context, where one version was designed for individualist New Zealand Europeans, a...

Motivated by both classroom needs and learning science questions, we developed two computer-based systems to help students learn the English article system (a, an, the, null). The first system, a menu-based task, mimics cloze activities found in many ESL textbooks. The second, a controlled-editing task, gives students practice with both detecting errors and producing the correct response. Resul...

The paper introduces a new research strategy for the investigation of human translation behavior. While conventional cognitive research methods make use of think aloud protocols (TAP), we introduce and investigate UserActivity Data (UAD). UAD consists of the translator’s recorded keystroke and eye-movement behavior, which makes it possible to replay a translation session and to register the sub...

Pervasive and ubiquitous computing has come a long way in recent years, and our technologies and experimental prototypes are slowly moving out of the lab and into people’s everyday lives. In this talk I will provide an overview of such research conducted by my team over the past years, and outline the main challenges that we face in the future, particularly in terms of making our technology acc...