Marianne Rudisill

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Two experiments examined selecting text using a movement sequence of pointing and dragging. Experiment 1 showed that, in the Point-Drag sequence, the pointing time was related to the pointing distance but not to the width of the text to be selected; in contrast, pointing time was related to both the pointing distance and the width of the text in the(More)
The paper challenges the notion that any Fitts' Law model can be applied generally to human-computer interaction, and proposes instead that applying Fitts' Law requires knowledge of the users' sequence of movements, direction of movement, and typical movement amplitudes as well as target sizes. Two experiments examined a text selection task with sequences(More)
Automated expert advisors should provide real time information that allows assessment of the advisor's response instead of providing explanation facilities that add to the operator's workload. In system control environments, an automated expert advisor applies established rules to system data, arriving at an assessment of the system status. The processing(More)
• Perform applied research examining user interaction with complex computer systems; • Apply the results of this research to the design of spacecraft computer-based workstations and HCIs; and • Serve as a resource in the discipline of human-computer interaction to support ongoing programs. The HCIL is one of five R&D laboratories within the Crew Interface(More)
Three models of human interactions with computer-displayed statistical graphics were developed and tested in an experiment which examined users' speed and accuracy on identification and comparison questions using 17 graph types. The results indicated that response time and accuracy were influenced by the perceptual and informational complexity of the graph,(More)
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