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Presented by Chih-Tang Lee Eshita Sharmin

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Presented by Chih-Tang Lee Eshita Sharmin

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  1. Older Adults and Visual ImpairmentWhat Do Exposure Times and Accuracy Tell Us About Performance Gains Associated with Multimodal Feedback?byJulie A. Jacko, Ingrid U. Scott, François Sainfort, Leon Barnard, Paula J. Edwards, V. Kathlene Emery, Thitima Kongnakorn, Kevin P. Moloney, Brynley S. Zorich Presented by Chih-Tang Lee Eshita Sharmin

  2. Introduction • Examine how multimodal feedback affects the performance of older adults with normal vision and older adults with visual impairments resulting from Age-Related Macular Degeneration (AMD) in manipulation tasks; pointing, moving, and selecting objects within an interface.

  3. Background • The American Foundation for the Blind estimates that 10 million individuals in the United States are visually impaired or blind. • The 1999 Census Bureau’s Survey of Income and Program Participation reported that 53% of individuals with general acuity loss had access to the Internet, compared to only 28% of individuals with visual impairment. • What is AMD? • AMD is one of the leading causes of severe visual impairment in the aging population, affecting nearly two million Americans. It is a progressive disease in which the macula, degenerates over time. A loss of central vision degrading individual’s ability to perform focus-intensive activities, such as reading, driving, or using a computer.

  4. The Experiment 1/3 • 59 participants • 36 Female, 23 Male • 54-91 years old (average = 76.0) • Grouped based on presence of AMD. • $50 incentive plus free clinical eye exam, including best-corrected visual acuity using the ETDRS eye exam. • Background questionnaire. • Perform Purdue Pegboard test of manual dexterity.

  5. The Experiment 2/3 • Equipment training. • PIII, 384MB RAM • Sat 24” away from 20” Trinitron flat monitor (1152x864, 32-bit color setting) • Logitech WingMan FF Mouse • Perform a series of drag-and-drop tasks. • Multimodal AHV 2.0 • File icon located at bottom center of task space • Target folder icon randomly located • 15 repetitions of the task for each of 7 different combinations of feedback conditions • Auditory: sound of a suction cup • Visual: purple coloration of file icon • Haptic: force feedback of mouse

  6. The Experiment 3/3 • Performance Assessment • Efficiency measure • FTHT • TTHT • Effectiveness measure • OND • Data Analysis • ANOVA • ANCOVA

  7. Results (1/2)

  8. Results (2/2)

  9. Julie A. Jacko • Associate Professor of Industrial & Systems Engineering (ISyE) at the Georgia Institute of Technology • PhD, MS, BS in Industrial Engineering, Purdue University • Interest: human factors, human-computer interaction, universal access to technology Publications • Sears, A. & Jacko, J. A. Toward ecological evaluations of distributed computing. To appear in Human-Computer Interaction, 15(1), in-press. • Jacko, J. A., Sears, A., & Sorensen S. J. A framework for usability: healthcare professionals and the Internet. To appear in Ergonomics, in press. • Jacko, J. A., Sears, A. & Borella, M. S. Toward a characterization of the temporal usability of distributed multimedia documents. To appear in Behaviour and Information Technology, in-press. • Sears, A., Jacko, J. A., & Dubach, E. M. (2000) International aspects of WWW usability and the role of high-end graphical enhancements. International Journal of Human-Computer Interaction, 12(2), 243-263. • Jacko, J. A., Rosa, R. H., Scott, I. U., Pappas, C. J., & Dixon, M. A. (2000) Visual Impairment: The Use of Visual Profiles in Evaluations of Icon Use in Computer-Based Tasks. International Journal of Human-Computer Interaction, 12(1), 151-165.

  10. Authors • Ingrid U. Scott • Assistant Professor, Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami School of Medicine • Publications: http://www.informatik.uni-trier.de/~ley/db/indices/a-tree/s/Scott:Ingrid_U=.html • Francois Sainfort • Associate Dean for Interdisciplinary ProgramsProfessor of Industrial & Systems Engineering, Georgia Institute of Technology • Publications: http://www.isye.gatech.edu/people/faculty/Francois_Sainfort/publications/

  11. Authors • Leon Barnard • M.S.I.E. in Human-Integrated Systems at Georgia Tech (in progress) • B.S. in Industrial Engineering University of Wisconsin - Madison • Paula J. Edwards • PhD, Industrial and Systems Engineering, Georgia Institute of Technology (in progress) • BS, Industrial and Systems Engineering, Georgia Institute of Technology

  12. Authors • V. Kathlene Emery • PhD, Industrial and Systems Engineering, Georgia Institute of Technology (in progress) • BS, 2000, Industrial Engineering, University of Wisconsin-Madison • Thitima Kongnakorn • PhD, Industrial and Systems Engineering, Georgia Institute of Technology (in progress) • MS, 1998, Industrial Engineering, University of Wisconsin-Madison

  13. Authors • Kevin P. Moloney • PhD, Industrial and Systems Engineering, Georgia Institute of Technology (in progress) • BS, 2001, Biology, Purdue University • BA, 2001, Psychology, Purdue University • Brynley S. Zorich • PhD, Industrial and Systems Engineering, Georgia Institute of Technology

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