Number of co-authors:26
Number of publications with 3 favourite co-authors:Yan Xiao:2Daniel Gopher:2Paul Mlyniec:2
F. Jacob Seagull's 3 most productive colleagues in number of publications:Susan R. Fussell:46Neff Walker:19Daniel Gopher:13
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F. Jacob Seagull
Publications by F. Jacob Seagull (bibliography)
Seagull, F. Jacob, Clanton, Tameka, Yoganandan, Arun, Jerald, Jason and Mlyniec, Paul (2011): Comparing Remote and In-person Collaboration in Three Virtual Tasks Using a Two-handed Interface. In: Proceedings of the Human Factors and Ergonomics Society 55th Annual Meeting 2011. pp. 490-494.
We describe an immersive and distributed 3D medical system that uses a Two-Handed Interface (THI) to enable intuitive interaction with multimedia objects and space. Previous studies have shown a THI to be useful compared to standard keyboard-and mouse interfaces. The current work examined the utility of a THI in virtual, avatar-to-avatar collaboration (i.e. two THI users in a shared virtual space, with one acting as a subject and one as a mentor). Twenty-five medically trained participants carried out the tasks of (1) navigation through virtual environments, (2) acquisition of shared visual perspective, and (3) precision manipulation of virtual objects. All tasks were carried out by each participant in face-to-face and in avatarto-avatar mentoring conditions. Results show avatar-to-avatar collaboration to be faster on all three types of tasks than face-to-face collaboration (p<.01). Using a THI, virtual telecollaboration was more effective than in-person collaboration in these virtual tasks.
© All rights reserved Seagull et al. and/or HFES
Li, Huiyang, Lu, Sara, Schumacher, Robert E. and Seagull, F. Jacob (2011): Why Multidisciplinary Rounds are not Multidisciplinary: Examination of a Neonatal ICU Rounding Process. In: Proceedings of the Human Factors and Ergonomics Society 55th Annual Meeting 2011. pp. 758-762.
Multidisciplinary rounds in the critical care environment have demonstrated improved communication, enhanced efficiency and better patient outcome. However, the mechanisms by which they work are not fully understood. Particularly, few studies have investigated the degree to which multidisciplinary rounds are indeed multi-disciplinary, and which factors contributed to their multidisciplinary nature. Very few tools have been developed to facilitate collaborative work for the rounding team. We attempt to fill some of these gaps by observing and evaluating multidisciplinary rounds in a Neonatal Intensive Care Unit. We observed morning rounds on 44 patients and analyzed auditing records of rounds on 62 patients. Analysis focused on participation and contribution of different disciplines, interactions between rounding members, and dimensions of the multidisciplinary nature of rounds. The analysis showed wide variation in the level of participation and contribution across disciplines. The main factors that contributed to rounds' multidisciplinary nature fell into five categories, including number of participants, specific disciplines participating, and their interactions. A paper-based tool that was used to facilitate the rounds incorporated a significant amount of input from the nurses, but not other specialists. These findings suggest important implications in the implementation of multidisciplinary rounds and the development of information systems to facilitate collaboration.
© All rights reserved Li et al. and/or HFES
Lazzara, Elizabeth H., Weaver, Sallie J., Weinger, Matthew B., Feldman, Moshe, Rosen, Michael A., Harrison, Kyle and Seagull, F. Jacob (2011): Simulation in Healthcare: One size fits all?. In: Proceedings of the Human Factors and Ergonomics Society 55th Annual Meeting 2011. pp. 828-830.
Simulation has been rapidly adopted within the medical community as evidenced by the fact that clinical care providers from all backgrounds (e.g., residents, physicians, nurses, anesthesiologists, ancillary staff, etc.) and all institutions (e.g., hospital, training centers, and medical schools) have incorporated simulation into their training and education curriculums. Although simulators are becoming a staple in clinical education, simulation is not a one-size-fits-all solution. Thus, the objective of the current panel is to combine the expertise of leading human factors and clinical care providers in the fields of learning, simulation, human performance, and human-system interaction to provide their insight and perspective on the following questions: What are the issues to consider when developing, implementing, and evaluating simulation-based training across a broad spectrum of training, education, and improvement applications in the healthcare domain? What are the contributions that human factors science and healthcare experts can combine to effectively develop, execute, and assess simulation-based training in hospitals, training centers, and medical schools?
© All rights reserved Lazzara et al. and/or HFES
Seagull, F. Jacob, Xiao, Yan, Eibling, David and Gorman, Paul (2010): Debate: Is There Low Hanging Fruit in Healthcare Human Factors. In: Proceedings of the Human Factors and Ergonomics Society 54th Annual Meeting 2010. p. 1905.
Does Human Factors and Ergonomics have anything to contribute to patient safety and healthcare practices? Most people would say yes. However, there is great controversy as to the form the contribution can take. Can this contribution be made in the form of standards, recommended practices, and principles of human factors? Or must our contribution consist of the dedication of human factors professionals within the domain of healthcare? Some assert that healthcare is so complex that simple guidelines and best practices will not solve any significant problems; all worthwhile problems require the in-depth, sophisticated techniques performed by human factors professionals. This session will present a debate that examines these issues. The results of the debate may help focus healthcare human factors toward the most productive approaches for influencing healthcare and patient safety.
© All rights reserved Seagull et al. and/or HFES
Seagull, F. Jacob, Miller, Peter, George, Ivan, Mlyniec, Paul and Park, Adrian (2009): Interacting in 3D Space: Comparison of a 3D Two-handed Interface to a Keyboard-and-mouse Interface for Medical 3D Image Manipulation. In: Proceedings of the Human Factors and Ergonomics Society 53rd Annual Meeting 2009. pp. 2004-2008.
Interacting with computer-generated 3-dimensional (3D) data can pose challenges in the control of 3D objects and navigation in 3D space. The traditional mouse-driven interfaces are limited to controlling two degrees of freedom (DOF) at a time. The current research examines the efficacy of a two-handed interface (THI), "iMedic," that uses two 6-DOF controllers that afford a more direct style of manipulation of 3D medical imagery. The iMedic interface employs a 3D "multi-touch" type of interaction for manipulation of objects, and self-navigation in space. Medical 3D images of human anatomy from computer tomography (CT) scans were used as a testbed in comparing the two interface: the THI, and a traditional keyboard-and-mouse interface (KMI) commonly used in medical imaging contexts. Novice system users with medical background used each system to carry out navigation, visual search, and measurement tasks with abstract synthetic and realistic anatomical objects. Results indicate that for novice users, there was no clear advantage to either interface in subjective or objective measures. However, a case study of an experienced user showed clear advantages in all tasks using the THI. Reasons for the findings are examined, and interface design implications are discussed.
© All rights reserved Seagull et al. and/or their publisher
Kobayashi, Marina, Fussell, Susan R., Xiao, Yan and Seagull, F. Jacob (2005): Work coordination, workflow, and workarounds in a medical context. In: Proceedings of ACM CHI 2005 Conference on Human Factors in Computing Systems 2005. pp. 1561-1564.
In this paper we report an ethnographic study of workarounds-informal temporary practices for handling exceptions to normal workflow-in a hospital environment. Workarounds are a common technique for dealing with the inherent uncertainty of dynamic work environments. Workarounds can help coordinate work, especially under conditions of high time pressure, but they may result in information or work protocols that are unstable, unavailable, or unreliable. We investigated workarounds and their effects through observation and interviews in a major teaching medical center. Our results suggest 4 key features of workarounds that technologies might help address: (a) workarounds differ as a function of people's role; (b) workarounds draw on tacit knowledge of others' abilities and willingness to help; (c) workarounds can have a cascading effect, causing other workarounds down the line; (d) workarounds often rely on principles of fairness and who owes whom a favor. We provide recommendations for designing systems to better support workarounds in dynamic environments.
© All rights reserved Kobayashi et al. and/or ACM Press
Seagull, F. Jacob and Gopher, Daniel (1994): Expanding the Envelope of Performance: Training Pilots to Use Helmet Mounted Displays. In: Proceedings of the Human Factors and Ergonomics Society 38th Annual Meeting 1994. pp. 11-15.
Helmet Mounted flight Displays (HMDs) of a through-the-window field-of-view (FOV) are widely used in modern aircraft for night vision. Unfortunately, pilots using such displays are susceptible to spatial disorientation due to the limited field-of-view and its consequent lack of orientation cues. This problem is especially pronounced when pilots move their heads, though this is precisely the behavior that enables them to counteract the limited FOV. The current experiment attempted to train pilots to move their heads without becoming disoriented. Twenty-five subjects participated in five treatment groups in a between-subjects design. Subjects piloted a simulated helicopter through a computer-generated winding canyon with either a single-eye HMD, or a binocular through-the-window "screen" display. Three control groups were trained using either (1) a binocular screen-display without a secondary task, (2) an HMD view without a secondary task, or (3) an HMD view with a secondary task presented in the center of the HMD FOV. The two remaining treatment conditions involved flying while carrying out a secondary task which required either (1) systematic head movement (displacement), or (2) systematic head-movement plus head re-orientation. Results indicate that after training, treatment groups completed significantly more flights without crashing using the HMD than did the control groups. They also had a significantly higher probability of surviving a given flight at any time. Treatment groups learned to increase their head movement, while control groups spontaneously reduced theirs. These findings indicate that spontaneous experience with an HMD does not lead to optimal performance. Development of attention control strategies focusing on the difficulties of HMDs increased considerably the ability of operators to cope with the problems.
© All rights reserved Seagull and Gopher and/or Human Factors Society
Seagull, F. Jacob and Walker, Neff (1992): The Effects of Hierarchical Structure and Visualization Ability on Computerized Information Retrieval. In International Journal of Human-Computer Interaction, 4 (4) pp. 369-385.
This study examined the effects of visualization ability on search time in databases with different hierarchical structures. It was designed to determine whether manipulation of the hierarchical structures of information could accommodate the needs of low-visualization ability users. The task consisted of finding specific "target" files in each of the four different data structures that varied in depth of organization. The study found the expected effects of organizational structure and visualization ability on retrieval time from the database. It did not find any evidence of an interaction between the two variables on performance. The results suggest that individual differences in performance are the result of differences in perceptual speed and that altering the structure of the information in a database is not an effective way to accommodate to low-visualization ability users.
© All rights reserved Seagull and Walker and/or Lawrence Erlbaum Associates
Gopher, Daniel, Kimchi, Ruth, Seagull, F. Jacob, Catz, Irit and Trainin, Ori (1992): Flying with Dichoptic Displays: The Interplay between Display Characteristics and Attention Control. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. pp. 1469-1473.
Interest in the study of attention control under dichoptic conditions is instigated by the contemporary development of night-vision systems based on single-eye helmet-mounted displays. Two experiments were conducted to investigate the concurrent performance of a tracking task and letter classification under dichoptic display conditions. Subjects were required to fly a simulated helicopter path while classifying letter pairs presented intermittently. Experimental instructions in Experiment A specifically emphasized a two-dimensional interpretation of the visual field. Under these instructions, the presentation of a common visual axis to the two eyes provided by the flight-tunnel did not aid subjects, and their performance deteriorated in dichoptic conditions. In Experiment B, the instructions to subjects were changed to advocate a three-dimensional interpretation of the display. Under these instructions, dichoptic performance-levels were substantially improved when the tunnel was present. These results imply that the presence of a common visual axis is not automatically beneficial. In order to improve performance, attention should be intentionally directed to utilize information supporting a three-dimensional frame of mind. These findings have important implications for understanding the dynamics of performance with single-eye helmet-mounted displays, and the training of pilots in their use.
© All rights reserved Gopher et al. and/or Human Factors Society
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