modeling design knowledge

Great news! We’ve got another paper out on knowledge construction in design. We introduce something we call the CDH model of design knowledge, which stratifies different bodies of design-specific knowledge into ranked levels. We compare it with existing hierarchical models of knowledge, and describe its unique uses and benefits for both design research and design […]

Interactivity Profiler

Last year, along with Omar Sosa-Tzec and John M. Carroll, I published a paper at SIGDOC introducing the concept of visual references. Visual references combine bibliographic information with photographic images, textual annotations, and diagrammatic annotations, in order to communicate what we called design-related intellectual influence. The following diagram distinguishes visual references from traditional, text-based references […]

Co-designing Platform Collectivism

Abstract: We report a codesign effort to envision a community water quality data platform with local stakeholders. We employed interviews, field observations, and hackathons through a 9-month study (ongoing). This codesign effort helps to distinguish our proposal of platform collectivism, in which local resources and stakeholders become more visible, accessible, and engaged with one another […]


Super excited that our (Omar Sosa-Tzec and John M. Carroll) submission to SIGDOC was accepted and that we’ll be publishing a full paper in the ACM digital library to accompany the presentation. The paper takes an existing thread of my research in an exciting new direction, and I couldn’t have done it without the insight […]

new publication

Great news! We have a new publication out today summarizing some of the work we’ve been doing in an online debate community ( In particular, we discuss how conflict can serve as well as undermine the work that moderators do, and we highlight ways that UI design could be a scalable way to facilitate conflict […]

GroupMe Projects

For the final project in my undergrad human-centered design class this year, I gave students a design brief focused on GroupMe. The challenge was broad, and the deliverables were diverse and interesting. In addition to generating presentations, I asked students to create one-sheets showcasing their projects. One of the teams (David Lu, Alex Yun, Kevin […]

New Human-Centered Design Syllabus

We’re closing in on the end of the spring semester here at Penn State University, and, unlike in year’s past, I’ve already finished my syllabus revisions. Download the new version here. The speediness of these revisions is due to a stellar graduate student who is also the instructional assistant who helped me teach the class […]

Scenario-based Design Courses

I’m looking for syllabi or links to online courses focused on scenario-based design. Instructive case studies, methods, tools, techniques, and assignments. All of it. If there aren’t lots of resources out there, then I’m also curious to know whether there is an interest for such a course.