1. Understanding Diagrammatic Ink in Lecture Richard Anderson, Ruth Anderson, Crystal Hoyer, Craig Prince, Fred Videon, Steve Wolfman FSS 2004 Slides designed with minimal text

2. Introduce classroom environment Describe study – empirical analysis of lecture archive

3. Diagram use in the wild Identify properties of diagrams Challenges for analysis

4. Simple example - Irregular shapes - Cryptic labels - Attentional ink

5. Similar style, different instructor

7. Analyze example with respect to applications Static summary Student note taking

8. Closer look – challenge of identifying structure based on multiple lines

9. Phasing in diagrams

10. More examples of phasing

11. Locality in diagrams – inconsistent meaning of ink In discussion some of the ink is ignored Top arrows: “Not there” Separate wins indicated together

12. Attentional ink issues Ink that is both iconic and attentional Challenge of distinguishing attentional (A) from diagrammatic (B) Ink that changes meaning: check marks next to 1, 2, 3, become Locks Opportunistic use of ink

13. For more information http://www.cs.washington.edu/education/dl/presenter/ Richard Anderson, anderson@cs.washington.eduanderson@cs.washington.edu Ruth Anderson, ruth@cs.virginia.eduruth@cs.virginia.edu