Publications and Presentations

Refereed Journal Publications

  • Saket, B., Srinivasan, A., Ragan, E., Endert, A. (2017). Evaluating Interactive Graphical Encodings for Data Visualization. IEEE Transactions on Visualization and Computer Graphics, PP, 1-14. doi: 10.1109/TVCG.2017.2680452 (link | pdf)

  • Johnson, A., Hicks, D., Ogle, T., Bowman, D., Cline, D., Ragan, E. (2017). If This Place Could Talk: Using Augmented Reality to Make the Past Visible. Social Education, 81(2), March/April 2017, pp. 112-116(5). (link)

  • Ragan, E., Scerbo, S., Bacim, F., and Bowman, D. (2016). Amplified Head Rotation in Virtual Reality and the Effects on 3D Search, Training Transfer, and Spatial Orientation. IEEE Transactions on Visualization and Computer Graphics, PP, 1-14. doi: 10.1109/TVCG.2016.2601607 (link | pdf)

  • Ragan, E., Endert, A., Sanyal, J., and Chen, J. (2016). Characterizing Provenance in Visualization and Data Analysis: An Organizational Framework of Provenance Types and Purposes. IEEE Transactions on Visualization and Computer Graphics, 22(1), 31-40. doi: 10.1109/TVCG.2015.2467551 (link | pdf)

  • Ragan, E., Bowman, D., Kopper, R., Stinson, C., Scerbo, S., and McMahan, R. (2015). Effects of Field of View and Visual Complexity on Virtual Reality Training Effectiveness for a Visual Scanning Task. IEEE Transactions on Visualization and Computer Graphics, 21(7), 794-807. doi: 10.1109/TVCG.2015.2403312 (link | pdf)

  • Ragan, E., Jennings, S., Massey, J., and Doolittle, P. (2014). Unregulated Use of Laptops over Time in Large Lecture Classes. Computers and Education, 78, 78-86. doi: 10.1016/j.compedu.2014.05.002. (link | pdf)

  • Ragan, E., Kopper, R., Schuchardt, P., and Bowman, D. (2013). Studying the Effects of Stereo, Head Tracking, and Field of Regard on a Small-Scale Spatial Judgment Task. IEEE Transactions on Visualization and Computer Graphics, 19(5), 886-896. doi: 10.1109/TVCG.2012.163. (link | pdf)

  • Bowman, D., McMahan, R., and Ragan, E. (2012). Questioning Naturalism in 3D User Interfaces. Communications of the ACM, 55(9), 78-88. doi: 10.1145/2330667.2330687. (link | pdf)

  • Ragan, E., Huber, K., and Bowman, D. (2012). Supporting Cognitive Processing with Spatial Information Presentations in Virtual Environments. Virtual Reality, 16(4), 301-314. doi: 10.1007/s10055-012-0211-8. (link | pdf)

  • McMahan, R., Ragan, E., Leal, A., Beaton, R., and Bowman, D. (2011). Considerations for the Use of Commercial Video Games in Controlled Experiments. Entertainment Computing, 2(1), 3-9. doi: 10.1016/j.entcom.2011.03.002. (link | pdf)

  • Ragan, E., Sowndararajan, A., Kopper, R., and Bowman, D. (2010). The Effects of Higher Levels of Immersion on Procedure Memorization Performance and Implications for Educational Virtual Environments. Presence: Teleoperators and Virtual Environments, 19(6), 527-543. doi:10.1162/pres_a_00016. (link | pdf)

Refereed Conference Publications

  • Sargunam, S., Moghadam, K., Suhail, M., and Ragan, E. (2017). Guided Head Rotation and Amplified Head Rotation: Evaluating Semi-Natural Travel and Viewing Techniques in Virtual Reality. To appear in IEEE Virtual Reality Conference (IEEE VR). (pdf)

  • Stewart, R., Wilkerson, C., Ragan, E., Agreda, M., White, D., and Piburn, J. (2016). A 3D Virtual Environment for Spatio-Temporal Analysis: Theoretical Approach, Proof of Concept, and User Study. In Proceedings of International Conference on Geographic Information Science (GIScience) 2016. (pdf)

  • Singh, G., Bowman, D., Hicks, D., Cline, D., Ogle, J., Johnson, A., Zlokas, R., Tucker, T., and Ragan, E. (2015). CI-Spy: Designing A Mobile Augmented Reality System for Scaffolding Historical Inquiry Learning. In Proceedings of International Symposium on Mixed and Augmented Reality (ISMAR 2015). MASH'D (Media, Arts, Social Sciences, Humanities & Design) paper. IEEE Computer Society. doi: 10.1109/ISMAR-MASHD.2015.19 (link | pdf)

  • Ragan, E., Goodall, J., and Tung, A. (2015). Evaluating How Level of Detail of Visual History Affects Process Memory. In Proceedings of CHI Conference on Human Factors in Computing Systems (CHI 2015). 2711-2720. ACM. doi: 10.1145/2702123.2702376 (link | pdf)

  • Bowman, D., Ragan, E., Scerbo, S., and Bacim, F. (2013). Evaluating the Impact of Head Rotation Amplification on Virtual Reality Training Effectiveness. In Proceedings of Interservice/Industry Training, Simulation and Education Conference (I/ITSEC 2013). Orlando, FL. NTSA.

  • Bacim, F., Ragan, E., Scerbo, S., Setareh, M., Jones, B., and Polys, N. (2013). The Effects of Display Fidelity, Visual Complexity, and Task Scope on Spatial Understanding of 3D Graphs. In Proceedings of Graphics Interface 2013. (link | pdf)

  • Bowman, D., Stinson, C., Ragan, E., Scerbo, S., Hollerer, T., Lee, C., McMahan, R., and Kopper, R. (2012). Evaluating effectiveness in virtual environments with MR simulation. In Proceedings of Interservice/Industry Training, Simulation and Education Conference (I/ITSEC 2012). Orlando, FL. NTSA. (link | pdf)

  • Ragan, E., Wood, A., McMahan, R., and Bowman, D. (2012). Trade-Offs Related to Travel Techniques and Level of Display Fidelity in Virtual Data-Analysis Environments. In Proceedings of Joint Virtual Reality Conference of EGVE - ICAT - EuroVR, 2012. Eurographics. doi: 10.2312/EGVE/JVRC12/081-084. (link | pdf)

  • Ragan, E., Endert, A., Bowman, D., and Quek, F. (2012). How Spatial Layout, Interactivity, and Persistent Visibility Affect Learning with Large Displays. In Proceedings of the International Working Conference on Advanced Visual Interfaces, AVI 2012. ACM. doi: 10.1145/2254556.2254576. (link | pdf)

  • Ragan, E., Huber, K., Laha, B., and Bowman, D. (2012). The Effects of Navigational Control and Environmental Detail on Learning in 3D Virtual Environments. In Proceedings of the 2012 IEEE Virtual Reality Conference. Orange County, CA. IEEE Computer Society. doi: 10.1109/VR.2012.6180868. (link | pdf)

  • Bowman, D., Sowndararajan, A., Ragan, E., and Kopper, R. (2009). Higher Levels of Immersion Improve Procedure Memorization Performance. In Proceedings of Joint Virtual Reality Conference of EGVE - ICAT - EuroVR, 2009. Lyon, France. Eurographics (JVRC 2009). doi: 10.2312/EGVE/JVRC09/121-128. Award winner for best paper honorable mention. (link | pdf)

  • Ragan, E., Frezza, S., and Cannell, J. (2009). Product-Based Learning in Software Engineering Education. In Proceedings of IEEE Frontiers in Education 2009 Conference. San Antonio, Texas. doi: 10.1109/FIE.2009.5350648. (link | pdf)

  • Barksdale, J., Ragan, E., and McCrickard, S. (2009). Easing Team Politics in Agile Usability: A Concept Mapping Approach. In Proceedings of the 2009 Conference on Agile Software Development. Chicago, Illinois. doi: 10.1109/AGILE.2009.57. (link | pdf)

Conference Workshop Papers, Extended Abstracts, and Presentations

  • Tang, F., McMahan, R., Ragan, E. and Allen, T. (2017). Subjective Evaluation of Tactile Fidelity for Single-Finger and Whole-Hand Touch Gestures. Conference paper in Proceedings of HCI International 2017. Springer. (pdf)

  • Moghadam, K. and Ragan, E.. (2017). Towards Understanding Scene Transition Techniques in Immersive 360 Movies and Cinematic Experiences. Extended poster abstract. In Proceedings of IEEE Virtual Reality 2017. (pdf)

  • Suhail, M., Sargunam, S., Han, D., and Ragan, E.. (2017). Redirected Reach in Virtual Reality: Enabling Natural Hand Interaction at Multiple Virtual Locations with Passive Haptics. Extended poster abstract. In Proceedings of IEEE Symposium on 3D User Interfaces 2017. (pdf)

  • Han, D., Sargunam, S., and Ragan, E.. (2017). Simulating Anthropomorphic Upper Body Actions in Virtual Reality using Head and Hand Motion Data. Extended poster abstract. In Proceedings of IEEE Virtual Reality 2017. (pdf)

  • Peña, A. and Ragan, E.. (2017). Contextualizing Construction Accident Reports in Virtual Environments for Safety Education. Extended poster abstract. In Proceedings of IEEE Virtual Reality 2017. (pdf)

  • Brown, C., Bhutra, G., Suhail, M., Xu, Q., and Ragan, E.. (2017). Coordinating Attention and Cooperation in Multi-user Virtual Reality Narratives. Extended poster abstract. In Proceedings of IEEE Virtual Reality 2017. (pdf)

  • Cassel, A., Ragan, E., Wood, L., Nowotarski, C., and Conlee, D. (2017). Virtual Reality for Collaborative Weather Briefings and Education. Poster presentation. 16th Annual AMS Student Conference 2017. American Meteorological Society.

  • Pachuilo, A., Ragan, E.., and Goodall, J. (2016). Leveraging Interaction History for Intelligent Configuration of Multiple Coordinated Views in Visualization Tools. Logging Interactive Visualizations and Visualizing Interaction Logs (LIVVIL) Workshop at IEEE VIS 2016. (link | pdf)

  • Linder, R., Peña, A., Jayarathna, S., and Ragan, E. (2016). Results and Challenges in Visualizing Analytic Provenance of Text Analysis Tasks Using Interaction Logs. Logging Interactive Visualizations and Visualizing Interaction Logs (LIVVIL) Workshop at IEEE VIS 2016. (link | pdf)

  • Ogle, T., Hicks, D., Bowman, D., Cline, D., Ragan, E., and Tucker, T. (2016). Supporting disciplined inquiry with mobile augmented reality. 2016 AECT International Convention. Las Vegas, Nevada.

  • Johnson, A., Hicks, D., Bowman, D., Cline, D., Ogle, T., Singh, G., Zlokas, R., and Ragan, E. (2015). Augmented reality, junior detectives, and the c3 inquiry arc. National Council of Social Studies Annual Conference.

  • Hicks, D., Ogle, T., Bowman, D., Cline, D., Ragan, E., Singh, G., Johnson, A., & Zlokas, R (2015). Reflection on action: Mode 2 knowledge production and the development of mobile augmented reality for scaffolding historical inquiry. Invited demonstration at the Applied Research in Immersive Environments for Learning SIG at the annual conference of the American Educational Research Association.

  • Zlokas, R., Johnson, A., Cline, D., Bowman, D., Singh, G., Ogle, T., Hicks, D., and Ragan, E. (2015). Using augmented reality to help teach elementary school history. National Council on Public History Annual Meeting.

  • Johnson, A., McPherson, K., Ogle, T., Hicks, D., Cline, D., Bowman, D., Singh, G., Zlokas, R., and Ragan, E. (2015). New digital technologies and local history: Making the past visible. Virginia Council for Social Studies.

  • Lukasczyk, J., Liang, X., Luo, W., Middel, A., Ragan, E., Bliss, N., White, D., Hagen, H., and Maciejewski, R. (2015). A Collaborative Web-Based Environmental Data Visualization and Analysis Framework. Workshop paper. Proceedings of the Workshop on Visualization in Environmental Science (EnvirVis Workshop). Workshop at EuroVis, 2015. Eurographics. (pdf)

  • Tang, F., McMahan, R., Ragan, E. and Allen, T. (2015). A Modified Tactile Brush Algorithm for Complex Touch Gestures. Extended poster abstract. In Proceedings of the 2015 IEEE Virtual Reality Conference (pp. 295-296). IEEE Computer Society. doi: 10.1109/VR.2015.7223412 (link | pdf)

  • Ragan, E. and Goodall, J. (2014). Evaluation Methodology for Comparing Memory and Communication of Analytic Processes in Visual Analytics. Beyond Time And Errors: Novel Evaluation Methods For Visualization (BELIV Workshop). Workshop at IEEE VIS 2014. ACM. doi: 10.1145/2669557.2669563. (link | pdf)

  • Singh, G., Bowman, D., Hicks, D., Cline, D., Ogle, J., Johnson, A., Zlokas, R., and Ragan, E. (2014). CI-Spy: Using Mobile-AR for Scaffolding Historical Inquiry Learning. In Proceedings of International Symposium on Mixed and Augmented Reality (ISMAR 2014). Poster presentation. IEEE Computer Society. doi: 10.1109/ISMAR-AMH.2014.6935444. (link | pdf)

  • Smith, D., Chung, H., Ragan, E., Self, J., North, C., and Cate, A. (2013). Spatial and semantic memory for kinesthetic learning in large-scale visual displays. Poster presentation. Society for Neuroscience 2013. San Diego, California.

  • Ragan, E., Wilkes, C., Cao, Y., and Bowman, D. (2012). The Effects of Virtual Character Animation on Spatial Judgments. Extended poster abstract. In Proceedings of the 2012 IEEE Virtual Reality Conference. Orange County, CA. IEEE Computer Society. doi: 10.1109/VR.2012.6180921. (link | pdf)

  • Bacim, F., Ragan, E., Stinson, C., Scerbo, S., and Bowman, D. (2012). Collaborative Navigation in Virtual Search and Rescue. Research competition entry (3DUI Contest 2012). In Proceedings of the 2012 IEEE Symposium on 3D User Interfaces. IEEE Computer Society. doi: 10.1109/3DUI.2012.6184224. Award winner: First Place contest award. Award winner: Popular Choice Award. (link | pdf | CARNAGE video)

  • Ragan, E., Endert, A., Bowman, D., and Quek, F. (2011). The Effects of Spatial Layout and View Control on Cognitive Processing. In Proceedings of the 2011 ACM CHI Conference on Human Factors in Computing Systems, CHI Works in Progress. Vancouver, BC. ACM. doi: 10.1145/1979742.1979921. (link | pdf)

  • Bowman, D., McMahan, R., Stinson, C., Ragan, E., Scerbo, S., Hollerer, T., Lee, C., and Kopper, R. (2011). Evaluating Effectiveness in Virtual Environments with MR Simulation. Workshop paper. Marine Corps Warfighting Laboratory Workshop.

  • Stinson, C., Kopper, R., Scerbo, B., Ragan, E., and Bowman, D. A. (2011). The Effects of Visual Realism on Training Transfer in Immersive Virtual Environments. Poster presentation. Human Systems Integration Symposium 2011. Vienna, VA. Award winner for best poster.

  • Ragan, E., Logan, K., Bowman, D., Antol, J., and Brewster, P. (2010). Immersive Virtual Environments for Human Exploration. Poster presentation. In Proceedings of National Space & Missile Materials Symposium 2010. Scottsdale, AZ. (pdf)

  • Ragan, E., Brewster, P., and Antol, J. (2010). Immersive Virtual Environments for Human Exploration and Collaboration. Conference exhibition. Modeling and Simulation World Conference and Expo 2010. Hampton, VA.

  • Ragan, E., Wilkes, C., Bowman, D. A., and Hollerer, T. (2009). Simulation of Augmented Reality Systems in Purely Virtual Environments. Extended poster abstract. In Proceedings of the 2009 IEEE Virtual Reality Conference (pp. 287-288). Lafayette, LA. IEEE Computer Society. doi: 10.1109/VR.2009.4811058. (link | pdf)

Other Publications

  • Bebis, G., Boyle, R., Parvin, B., Koracin, D., Pavlidis, I., Feris, R., McGraw, T., Elendt, M., Kopper, R., Ragan, E., Ye, Z., Weber, G. (Eds.) (2015). Advances in Visual Computing 11th International Symposium, ISVC 2015, Las Vegas, NV, USA, December 14-16, 2015, Proceedings.

  • Ragan, E. (2013). Supporting Learning through Spatial Information Presentations in Virtual Environments. Virginia Tech. Doctoral Dissertation. (link | pdf)

  • Ragan, E., Huber, K., Bowman, D. (2011). Supporting Memorization and Problem Solving with Spatial Information Presentations in Virtual Environments Virginia Tech Computer Science Technical Report TR-11-18.

  • Ragan, E. (2011). Supporting Problem Solving with Spatial Information Displays. In T. Smith-Jackson and T. Coalson (Eds.). ISE 5604: Human Information Processing Scholar Series 2009-4. TR# VT-ISE-ACE2009-4, pp. 1 - 7.