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

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.

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

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

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

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 40.0379, -75.3430 Are these equivalent answers?

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

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

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)

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

W & B Questions (2) Key tilt @ keystroke level: Push button, tilt phone, release button Absolute tilt @ 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

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

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

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.

USI Research Research project description More examples MacKenzie, Kaupinnen, Silfverberg, Accuracy measures for evaluating computer pointing devices, Proc SIGCHI ‘01, Seattle, 10-16. Lee & Zhai, The performance of touch screen soft buttons, Proc SIGCHI ‘09, Boston, 309-318. 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.

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.