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In the course of running an eye-tracking experiment, one computer system or subsystem typically presents the stimuli to the participant and records manual responses, and another collects the eye movement data, with little interaction between the two during the course of the experiment. This article demonstrates how the two systems can interact with each(More)
This research investigates the cognitive strategies and eye movements that people use to search for a known item in a hierarchical computer display. Computational cognitive models were built to simulate the visual-perceptual and oculomotor processing required to search hierarchical and nonhierarchical displays. Eye movement data were collected and compared(More)
Visual search is an important part of human-computer interaction. It is critical that we build theory about how people visually search displays in order to better support the users' visual capabilities and limitations in everyday tasks. One way of building such theory is through computational cognitive modeling. The ultimate promise for cognitive modeling(More)
A comparative cognitive model of two manipulations of a complex dual task in which 3D audio cueing was used to improve operator performance is presented. The model is implemented within the EPIC cognitive architecture and describes extensions that were necessary to simulate gaze shifts and the allocation of attention between separated task displays. A(More)
Tim Halverson is a computer and information scientist with an interest in human-computer interaction, cognitive modeling, eye movements, and fatigue; he is a post-doctoral research associate in the Performance and Learning Model Team of the Air Force Research Laboratory. Anthony J. Hornof is a computer scientists with an interest in human-computer(More)
Human-computer systems intended for time-critical multitasking need to be designed with an understanding of how humans can coordinate and interleave perceptual, memory, and motor processes. This paper presents human performance data for a highly-practiced time-critical dual task. In the first of the two interleaved tasks, participants tracked a target with(More)
Visual search in an important aspect of many tasks, but it not well understood how layout design affects visual search. This research uses reaction time data, eye movement data, and computational cognitive modeling to investigate the effect of local density on the visual search of structured layouts of words. Layouts were all-sparse, all-dense, or mixed.(More)
This research advances computational cognitive modeling of visual search, and the synergistic relationship between cognitive modeling and eye tracking. The paper presents cognitive models of the perceptual, cognitive, and motor processing involved in the visual search of words in structured layouts that vary in density. The layouts are all-sparse,(More)