CS 3724 Claims and Scenarios

1. CS 3724Claims and Scenarios Dr. Scott McCrickard McBryde 626 mccricks@cs.vt.edu

2. Scenarios and Claims • Scenarios convey what actors are like, what forces influence their behavior • Claims elaborate on scenarios, explaining how and why a feature has impacts • Claims analysis documents why scenarios were written by isolating the most important features • These are your data structures!

3. Scenarios in UE:A Simple Example A scenario describing a situation: A student, Akbar, is working on a research paper in the lab. While working on the paper, he wishes to be informed of happenings in his community. Akbar uses the Notification Collage (NC), running on a second monitor, to inform him of such information with occasional glances. When shuffling through items on the NC, he sees that a project partner has found information of immediate relevance. Fortunate to learn this, Akbar includes the information in his paper, finishing early.

4. An Associated Claim Maintaining awareness of group information on public displays using the collage metaphor

5. Elements of a Claim Maintaining awareness of group information on public displays using the collage metaphor TITLE UPSIDES & DOWNSIDES FEATURE RATIONALE REFERENCE RATING

6. Features Explained • Title describes the claim’s nature and domain • Feature is an artifact or element to be described • Upsides & downsides capture interesting positive and negative elements of the claim feature • Rationale explains where each claim came from • References cite publications used to derive the rationale • Scenario provides context for the claim • Rating reflects the contributions of the claim on accepted metrics within the domain But how do we calculate a rating? What are the “accepted” metrics? And what is the domain of interest?

7. The Domain: Notification Systems multiple displays vehicle navigation systems multiple windows Notification Systems Phidgets wearable displays PDAs large screen displays

8. More Notification Systems Sideshow Info art BonziBUDDY ePoster Scope More phidgets Ambient Fixtures weatherbug klipfolio ESPN’s BottomLine

9. Defining Notification Systems • Notification systems are interfaces that • provide reaction to and comprehension of valued information in an efficient and effective manner without introducing unwanted interruption to a primary task • are used in any divided-attention, multitasking situation • primary task & notification/secondary task • Notification systems are not • used in extended periods of concentration in an orderly, predictable task-action flow • exclusively desktop interfaces

10. Notification Systems Metrics Our definitions-- • Interruption: intentional and inherently useful reallocation of attention from a primary task to a notification • Reaction: immediate response resulting from a notification stimuli—with or without a shift of attention • Comprehension: information is made sense of, related to existing knowledge, and stored in long term memory for future use

11. IRC Ratings • An IRC rating— • describes goals relating to: • interruption level of a notification • immediate reaction to notifications • long term or deeper comprehension from notifications • annotated as: • low=0, high=1, with values in between in I, R, C order • therefore, a design model of “0/.5/1” would be intended support for “low interruption, moderate reaction, high comprehension”

12. Intutively, What Is It? Sideshow Info art BonziBUDDY ePoster Scope More phidgets Ambient Fixtures weatherbug klipfolio ESPN’s BottomLine

13. But How Do We Calculate It? • Easy! Use LINK-UP! • LINK-UP includes a tool for entering claims, including calculating IRC ratings • Answer a series of questions, and an IRC rating is calculated automatically • Not so fast, though… • Everything has to match: scenario, upsides/downsides, rationale, paper contents, IRC ratings • The secret: iterate! Read paper, highlight possible features and rationale, group into upsides/downsides for each feature, match rationale, calculate IRC, reconsider upsides, look for additional rationale in paper, …

14. LINK-UP

15. IRC Wizard

16. Revisiting the Claim Maintaining awareness of group information on public displays using the collage metaphor

17. Revisiting the Scenario A scenario describing a situation: A student, Akbar, is working on a research paper in the lab. While working on the paper, he wishes to be informed of happenings in his community. Akbar uses the Notification Collage (NC), running on a second monitor, to inform him of such information with occasional glances. When shuffling through items on the NC, he sees that a project partner has found information of immediate relevance. Fortunate to learn this, Akbar includes the information in his paper, finishing early.

18. HW 1 Spec Overview • Select a paper by Friday at noon (list will be posted to a Blackboard discussion group by 9pm tonight—to sign up, post a follow-up message to the paper you want (note: one person per paper!). • Construct a claim from the paper. Use the guidelines in the homework spec and today’s lecture. • Enter the claim into LINK-UP.Instructions for using LINK-UP are in the homework spec. Your login is your PID and your password is your student ID number. • Follow up to your Blackboard signup with the title of the claim (so that the GTAs can find it in the system and distinguish it from incomplete claims you may have written for practice).