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Visible Human Browsers: Formative Evaluation Based on Student Feedback

Visible Human Browsers: Formative Evaluation Based on Student Feedback. Neil Skov, EdD Wen Yu Lee, MS Deborah S. Walker, DNSc, CNM, FACNM Carl Berger, EdD. Introduction. Context: Next Generation Internet – Visible Human Project (NGI–VHP) User Interface and Evaluation Team Purpose:

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Visible Human Browsers: Formative Evaluation Based on Student Feedback

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  1. Visible Human Browsers:Formative Evaluation Basedon Student Feedback Neil Skov, EdD Wen Yu Lee, MS Deborah S. Walker, DNSc, CNM, FACNM Carl Berger, EdD Visible Human Conference, 2002

  2. Introduction • Context: • Next Generation Internet – Visible Human Project (NGI–VHP) • User Interface and Evaluation Team • Purpose: • Student use of Visible Human data sets • Formative evaluation of user interfaces Visible Human Conference, 2002

  3. Introduction Cont. • Research Questions: • What is the most effective way for student users to interact with VH browser interfaces? • What are students’ perceptions of the usefulness of the VH software for learning anatomy? Visible Human Conference, 2002

  4. Background • Formative Evaluation • Early feedback • Support design decisions • Types of Review • Expert or Formal • Potential users • Usability • Acceptance Visible Human Conference, 2002

  5. Methods • Hybrid Methodology • Qualitative • Semi-structured interview • Interview about instances • Focus group • Video Taping Visible Human Conference, 2002

  6. Methods Cont. • Participants • Second-year medical students • One year gross anatomy • Three groups of four Visible Human Conference, 2002

  7. Methods Cont. • Procedure • Demonstration • Student trials • Discussion • Repeat for Each Tool • Summary Discussion Visible Human Conference, 2002

  8. Methods Cont. • Software • Edgewarp 3D (EW) • PSC Volume Browser (PVB) • Other • Anatomy content database • Edgewarp fly-through simulation Visible Human Conference, 2002

  9. Edgewarp 3D Visible Human Conference, 2002

  10. PSC Volume Browser Visible Human Conference, 2002

  11. Data Analysis • Qualitative • Video Analysis • Joint viewing • Repetition • Notes (tables) • Search for Patterns • Thematic Organization Visible Human Conference, 2002

  12. Data Analysis Cont. Event Summary Table Visible Human Conference, 2002

  13. Data Analysis Cont. • Interactions with VH software • Controls • Interpretation of display • Strategies for use • Learning Anatomy • Student requirements for anatomy content • Use of the software for learning anatomy Visible Human Conference, 2002

  14. Data Analysis Cont. • Suggestions for • Control devices • New functions • Anatomy topics Visible Human Conference, 2002

  15. Selected Results • Interactions with VH Software: Controls • Like dragging yellow box (EW) • Preference for button bars • Image pixelation problem Visible Human Conference, 2002

  16. Selected Results Cont. • Interactions with VH Software: Display Interpretation Problems • Location of cut plane • Aspect • Motion • Translation • Rotation Visible Human Conference, 2002

  17. Results Cont. • Learning Anatomy • Labels, labels, labels, … • Head-and-neck and pelvis • Usefulness • Secondary resource • Steep learning curve • Value increase with time Visible Human Conference, 2002

  18. Principal Conclusions • Answers to Research Questions: Best Interface Features? • Familiar button bars, but … • Ability to jump/return to preset views • Dragging cut plane in context window Visible Human Conference, 2002

  19. Conclusions Cont. • Answers to Research Questions: Usefulness for Learning Anatomy? • Importance of models • Secondary learning tool ??? • Avoid excessive cognitive load Visible Human Conference, 2002

  20. Conclusions Cont. • Recommendations • Image refresh & synchronization • NGI !!! • Compression !!! • Orientation support • Models • “Compass” • Selectable user modes Visible Human Conference, 2002

  21. Conclusions Cont. • Remaining Issues • Student study preferences • Possible order effect • Future Work Visible Human Conference, 2002

  22. Credits • National Library of Medicine Brian Athey, P.I. (Contract: N01 - LM - 0 - 3511) • Edgewarp 3D Fred Bookstein & William Green • PSC Volume Browser Art Wetzel & Stuart Pomerantz • Arrangements and Demos Alex Ade, Walter Meixner, Geri Pelok, & Alex Terzian Visible Human Conference, 2002

  23. Visible Human Browsers: Formative Evaluation Based on Student Feedback Neil Skov, EdD (skov@umich.edu) Wen Yu Lee, MS Deborah S. Walker, DNSc, CNM, FACNM Carl Berger, EdD Visible Human Conference, 2002

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