1. User/System Interface CSC 8570-001
Meeting 2
September 3, 2019

2. Beginnings
SOP 1
When you use a (physical) key-based entry device, what do you do to the keys? A verb, please.
When you use a soft keyboard (e.g. iPad touchscreen), what do you do to the keys? Another verb, perhaps the same one, perhaps not.
What other actions do you perform with your fingers (counting your thumb as a “finger”), to enter information into a computer, or control the action of it?
Same question, but now interacting with a small screen device such as a mobile phone.

3. Table Experiment Pass in printed table.
Name on paper
Any difficulties in creating the table?
How many columns?
How many rows?
What software system(s) did you use?
Any difficulties printing the table?
3 columns, per specs
13 data rows plus one header row
Excel

4. Battery Operated Devices
From Piazza.com
(Did you think about how the interface helped or hindered you in completing your task?)
Mobile phone: 8 iPhones, 5 others
Laptop: 5 of various kinds
Watch: 7 of various kinds
Car remote: 3
Power bank: 2
Tablet: 1
Can you edit your name as it appears in piazza?
If so, please make your first name match that on your name plate

5. Where’s Gregor? Google Maps (8) Google? (2) GPS (2) App on phone (2)
Measuring app (1)
No answer (4)

6. Where’s Gregor? (2)
As far as I can tell, Google Maps on my iPhone will NOT give the latitude and longitude of my position when I stand in front of Gregor.
Apple Maps (built into the iPhone) gives the latitude and longitude if
You tap the blue dot showing your location
Slide up to read the answer
Compass (built into the iPhone) gives the latitude and longitude on its opening screen
BUT, Compass reports 40° 2’ 15” N, 75° 20’ 36” W
Apple Maps reports ,
Are these equivalent answers?

7. Partnerships Form learning groups as follows:
Ike, Kowmundi, Pat
Jess, Josh B, Moulika
Anthony, Chaitanya, Josh C
Harsha, Taylor, Usha
Jarred, Nitin, Vamsi
Greeshma, Jos, Mounika
Bhavan, John, Sheshank
Move to separate spaces in the room, in the lobby, outside on benches or walls

8. Wigdor & Balakrishnan
Sketch the hierarchical organization of the paper
Create a list of concepts that need further explanation, phrases that need clearer definitions, and descriptions that are just plain mysterious

9. Partnership Reports Paper structure
Tools for describing it
Concepts, phrases and descriptions in need of help
Paper structure (9 sections: 6 main, 3 supplemental)
Abstrct
Introduction
Related Work
Design Issues
Evalluation
Discussion
Conclusions and Future Work
Acknowledgements
References (15)

10. W & B Questions Circumstances of the paper
Average text message: 7 words
Estimate for number of text messages sent
Assertion: tilt with single keypress increases speed of text entry
Assertion: 3 techniques for overcoming key ambiguity
Key sequence 5,3,8 has 27 meanings: calculation?
Assertion: 8 ambiguous key presses on mobile phone
Assertion: 7 characters per key with upper and lower case

11. W & B Questions (2)
Key keystroke level: Push button, tilt phone, release button
Absolute keystroke level: tilt phone, push button
Number of participants, compensation
Corpus of text messages
Each treatment
Within subjects design
Experimental design summary
Faster than computation

12. W & B Questions (3) Analysis of variance Power law of learning
Best fit curve
Fitts’ Law vs. Fitt’s Law
Definitive definition of tilt parameter
Model based on Accot & Zhai
Working relative tilt implementation

13. W & B Comments Grammar and form which vs. that (Intro, l. 12)
the user … their
Reference style
Alphabetized by last name
Date, volume, number, pages
Italics, bold
Use APA or CACM

14. Progress from W & B Check authors’ current work Check citations
Discover Gupta, et al, RotoSwype: Word-Gesture Typing using a Ring, Proc SIGCHI ‘19, Glasgow, Paper 14.

15. USI Research Research project description More examples
MacKenzie, Kaupinnen, Silfverberg, Accuracy measures for evaluating computer pointing devices, Proc SIGCHI ‘01, Seattle,
Lee & Zhai, The performance of touch screen soft buttons, Proc SIGCHI ‘09, Boston,
Gupta’s paper is most recent in ACM Digital Library citing Wigdor. The paper contains 95 references, almost all related to styles of text input.

16. For Next Time
Perform Experiment 8: iPad Interactions and submit the results following the instructions in the experiment
Choose research project team (at most three members) and topic area. The topic should involve user interaction with small devices, which may well be hooked to the internet. (Sounds like IoT devices are acceptable for study, but the project is not limited to IoT.)
Report the names of the team members and the topic of investigation to the instructor by noon, Monday, September 9, 2019.
Note the early deadline.