In 1999, Gutwin developed a key phrase extraction algorithm along with Ian Witten, Gordon Paynter, Eibe Frank, and Craig Nevill-Manning called KEA. Key phrases are important to a document as they provide a brief summary of a document's content and as document collections such as digital libraries become larger, the value of such summary information increases. The goal of the algorithm is to help alleviate the tedious process of assigning key phrases manually. The algorithm uses machine learning, lexical methods, and calculates feature values for each candidate to predict which candidates are good key phrases.
Workspace awareness for groupware
In 2002, Gutwin along with Saul Greenberg, developed a research paper regarding the idea of workspace awareness and how it can help and improve the usability of a groupware application. The goal of the research was to provide groupware designers a framework about how to design for awareness in multi-user systems, specifically workspace awareness. The developed framework can help educate designers about awareness in groupware and help to improve the quality of the systems that are built.
In 2004, Gutwin, alongside Reagan Penner and Kevin Schneider, evaluated how distributed developers maintain group awareness. The team interviewed developers and reviewed project artifacts and communications from three open source projects. The findings suggested that developers maintain both a general awareness of the entire team and more detailed knowledge of people that they plan to work with. The primary tools for maintaining awareness were mailing lists and chat tools. The study is one of the first to consider how awareness works in the real world.
Tag clouds
In 2008, Gutwin along with Scott Bateman and Miguel Nacenta, explored the popular method of tag clouds which help visualize and link socially-organized information on websites. The goal of the research was to find out which visual features of tags draw the attention of viewers. The study was conducted by asking users to select tags from clouds that manipulated nine visual properties. The results showed that font size and font weight have stronger effects than other features such as intensity and number of characters. However, when several visual properties are changed at once, there is no one property that stands out above the others. The study also makes way for general applications such as the visual presentation of hyperlinks as a way to provide more information to web navigators.
Touch-based interaction
In 2012, Gutwin along with Andy Cockburn and David Ahlstrom, studied the human factors of touch based interactions such as tapping and dragging. The goal of the research was to provide developers a foundational knowledge in this area. The experiment was conducted using three input devices and three different pointing activities which were bidirectional tapping, one-dimensional dragging, and radial dragging. For tapping, the results showed that finger pointing was faster than the stylus/mouse but inaccurate. For dragging, finger input is slower than mouse and stylus. For radial dragging, it was found that task time and movement distance are all linearly correlated with number of items available. Other radial dragging results showed that the stylus is the fastest but had the highest error rate of the three devices.
Awards
Gutwin was inducted into the ACMCHI Academy for his contributions to HCI research in 2012. In 2015 he was recognized as an ACM Distinguished Researcher.
