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In comparison to multiple choice or other recognition-oriented forms of assessment, short answer questions have been shown to offer greater value for both students and teachers; for students they can improve retention of knowledge, while for teachers they provide more insight into student understanding. Unfortunately, the same open-ended nature which makes(More)
Geographically distributed collaborative teams often rely on synchronous text-based online communication for accomplishing tasks and maintaining social contact. This technology leaves a trace that can help researchers understand affect expression and dynamics in distributed groups. Although manual labeling of affect in chat logs has shed light on complex(More)
Distributed collaborative teams increasingly rely on online tools for interaction and communication in both social and task-oriented goals. Measuring and modeling these interactions along different dimensions can help understand, and better design for, distributed collaboration. Affect is one such dimension that can play a crucial role in the dynamics,(More)
Widespread adoption of biometric authentication technology has been slow because of technical, usability, and acceptability issues. Incorporating feedback from stakeholders throughout the design process is one way to ensure that biometric technologies have the best chance of achieving success. Emerging technology that performs biometric identification(More)
As part of a special issue of The Journal of Head Trauma Rehabilitation, forensic neuropsychology is reviewed as it applies to traumatic brain injury (TBI) and other types of acquired brain injury in which clinical neuropsychologists and rehabilitation psychologists may be asked to render professional opinions about the neurobehavioral effects and outcome(More)
Although laboratory user studies are the most common method for validating the utility of information visualiza-tion systems, it may be difficult to determine if such studies accurately reflect the tasks of real users. In this paper , we describe a longitudinal real-world user evaluation of a visual and interactive Web search interface designed to support(More)
TheHotMap.com is an example of a next-generation Web search interface, wherein users are able to take an active role in the Web search process. Information that can assist searchers in their Web search tasks is presented in a visual manner. The system supports user interaction both during the query refinement process, as well as the search results(More)
Researchers across many fields are increasingly using data from social media sites to address questions about individual and group social behaviors. However, the size and complexity of these data sets challenge traditional research methods; many new tools and techniques have been developed to support research in this area. In this paper, we present our(More)
Like most online content, user-generated content (UGC) poses accessibility barriers to users with disabilities. However, the accessibility difficulties pervasive in UGC warrant discussion and analysis distinct from other kinds of online content. Content authors, community culture, and the authoring tool itself all affect UGC accessibility. The choices,(More)